GH-422 Formalize Cloud Event conversion strategy to consistently handle binary-mode and structured-mode cloud events

Moved CloudEvent related artifacts to ‘cloud events’ package with hopes to eventually donating it to CNCF SDK
Created CloudEventUtils identifying necessary constants and utility methods

spring-cloud-function-samples/function-sample-cloudevent/pom.xml

@@ -2,28 +2,27 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
-	<parent>
-		<groupId>org.springframework.boot</groupId>
-		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.5.RELEASE</version>
-		<relativePath/> <!-- lookup parent from repository -->
-	</parent>
 	<groupId>io.spring.sample</groupId>
 	<artifactId>function-sample-cloudevent</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
 	<name>function-sample-cloudevent</name>
 	<description>Demo project for Spring Boot</description>
+	
+	
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.0-RC1</version>
+		<relativePath/>
+	</parent>
 
 	<properties>
-		<java.version>8</java.version>
+		<java.version>1.8</java.version>
+		<spring-cloud-function.version>3.1.0-SNAPSHOT</spring-cloud-function.version>
+		<wrapper.version>1.0.21.RELEASE</wrapper.version>
 	</properties>
 
 	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter</artifactId>
-		</dependency>
-		
 		<!-- REST - only needed if you intend to invoke via HTTP -->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -32,7 +31,7 @@
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-function-web</artifactId>
-            <version>3.1.0-SNAPSHOT</version>
+<!--             <version>3.1.0-SNAPSHOT</version> -->
         </dependency>
         <!-- end REST -->
       
@@ -59,8 +58,7 @@
 <!--             <version>3.1.0-SNAPSHOT</version> -->
 <!--         </dependency> -->
         <!-- end Kafka -->
-
-		<dependency>
+        <dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
@@ -73,13 +71,112 @@
 		</dependency>
 	</dependencies>
 
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-function-dependencies</artifactId>
+				<version>${spring-cloud-function.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+
 	<build>
 		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-deploy-plugin</artifactId>
+				<configuration>
+					<skip>true</skip>
+				</configuration>
+			</plugin>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
+				<dependencies>
+					<dependency>
+						<groupId>org.springframework.boot.experimental</groupId>
+						<artifactId>spring-boot-thin-layout</artifactId>
+						<version>${wrapper.version}</version>
+					</dependency>
+				</dependencies>
+			</plugin>
+			<plugin>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<configuration>
+					<includes>
+						<include>**/*Tests.java</include>
+						<include>**/*Test.java</include>
+					</includes>
+					<excludes>
+						<exclude>**/Abstract*.java</exclude>
+					</excludes>
+				</configuration>
 			</plugin>
 		</plugins>
 	</build>
 
+	<repositories>
+		<repository>
+			<id>spring-snapshots</id>
+			<name>Spring Snapshots</name>
+			<url>https://repo.spring.io/libs-snapshot-local</url>
+			<snapshots>
+				<enabled>true</enabled>
+			</snapshots>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+		</repository>
+		<repository>
+			<id>spring-milestones</id>
+			<name>Spring Milestones</name>
+			<url>https://repo.spring.io/libs-milestone-local</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</repository>
+		<repository>
+			<id>spring-releases</id>
+			<name>Spring Releases</name>
+			<url>https://repo.spring.io/release</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</repository>
+	</repositories>
+	<pluginRepositories>
+		<pluginRepository>
+			<id>spring-snapshots</id>
+			<name>Spring Snapshots</name>
+			<url>https://repo.spring.io/libs-snapshot-local</url>
+			<snapshots>
+				<enabled>true</enabled>
+			</snapshots>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+		</pluginRepository>
+		<pluginRepository>
+			<id>spring-milestones</id>
+			<name>Spring Milestones</name>
+			<url>https://repo.spring.io/libs-milestone-local</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</pluginRepository>
+		<pluginRepository>
+			<id>spring-releases</id>
+			<name>Spring Releases</name>
+			<url>https://repo.spring.io/libs-release-local</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</pluginRepository>
+	</pluginRepositories>
+
+
 </project>