Minor pom tweaks

Fix warnings and include sonar support.

pom.xml

@@ -72,10 +72,6 @@
 					<artifactId>maven-eclipse-plugin</artifactId>
 					<version>2.9</version>
 				</plugin>
-				<plugin>
-					<artifactId>maven-exec-plugin</artifactId>
-					<version>1.2.1</version>
-				</plugin>
 				<plugin>
 					<artifactId>maven-failsafe-plugin</artifactId>
 					<version>2.13</version>
@@ -124,6 +120,16 @@
 					<artifactId>maven-war-plugin</artifactId>
 					<version>2.3</version>
 				</plugin>
+				<plugin>
+					<groupId>org.codehaus.mojo</groupId>
+					<artifactId>exec-maven-plugin</artifactId>
+					<version>1.2.1</version>
+				</plugin>
+				<plugin>
+					<groupId>org.codehaus.mojo</groupId>
+					<artifactId>sonar-maven-plugin</artifactId>
+					<version>2.0</version>
+				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>versions-maven-plugin</artifactId>

spring-zero-intergration-tests/pom.xml

@@ -89,6 +89,7 @@
 					<settingsFile>src/it/settings.xml</settingsFile>
 					<projectsDirectory>${project.parent.basedir}/spring-zero-samples/</projectsDirectory>
 					<localRepositoryPath>${project.build.directory}/local-repo</localRepositoryPath>
+					<skipInvocation>${skipTests}</skipInvocation>
 				</configuration>
 				<executions>
 					<execution>