Add spring-cloud-function-dependencies and use it throughout

spring-cloud-function-core/pom.xml

@@ -14,6 +14,10 @@
 	</parent>
 
 	<dependencies>
+		<dependency>
+			<groupId>io.projectreactor</groupId>
+			<artifactId>reactor-core</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter</artifactId>
@@ -22,10 +26,6 @@
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-context</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>io.projectreactor</groupId>
-			<artifactId>reactor-core</artifactId>
-		</dependency>
 		<dependency>
 			<groupId>commons-io</groupId>
 			<artifactId>commons-io</artifactId>