Update the Spring Boot-based samples to use 2.0.0.RELEASE

Closes gh-494

samples/junit5/build.gradle

@@ -1,9 +1,9 @@
 buildscript {
 	repositories {
-		maven { url 'https://repo.spring.io/milestone' }
+		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M6'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.RELEASE'
 		classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.1'
 	}
 }

samples/rest-assured/build.gradle

@@ -1,9 +1,9 @@
 buildscript {
 	repositories {
-		maven { url 'https://repo.spring.io/milestone' }
+		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M1'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.RELEASE'
 	}
 }
 

samples/rest-notes-slate/build.gradle

@@ -1,10 +1,9 @@
 buildscript {
 	repositories {
 		mavenCentral()
-		maven { url 'https://repo.spring.io/milestone' }
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M6'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.RELEASE'
 	}
 }
 

samples/rest-notes-spring-data-rest/pom.xml

@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.0.0.M6</version>
+		<version>2.0.0.RELEASE</version>
 		<relativePath />
 	</parent>
 
@@ -128,15 +128,4 @@
 		</repository>
 	</repositories>
 
-	<pluginRepositories>
-		<pluginRepository>
-			<id>spring-snapshots</id>
-			<name>Spring snapshots</name>
-			<url>https://repo.spring.io/libs-snapshot</url>
-			<snapshots>
-				<enabled>true</enabled>
-			</snapshots>
-		</pluginRepository>
-	</pluginRepositories>
-
 </project>

samples/rest-notes-spring-hateoas/build.gradle

@@ -1,9 +1,9 @@
 buildscript {
 	repositories {
-		maven { url 'https://repo.spring.io/milestone' }
+		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M6'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.RELEASE'
 	}
 }
 

samples/testng/build.gradle

@@ -1,9 +1,9 @@
 buildscript {
 	repositories {
-		maven { url 'https://repo.spring.io/milestone' }
+		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M6'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.RELEASE'
 	}
 }