Polishing.

Revert proc=only in compiler plugin to apply annotation processors along with compilation.

See spring-projects#3229

Author: mp911de

spring-data-jpa/pom.xml

@@ -340,7 +340,6 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
-					<proc>only</proc>
 					<annotationProcessorPaths>
 						<path>
 							<groupId>com.querydsl</groupId>