Fixed issues in POM files. Ignored temporary files created during a build

git-svn-id: https://hyracks.googlecode.com/svn/branches/fullstack_staging@2808 123451ca-8445-de46-9d55-352943316053
diff --git a/pregelix/pregelix-runtime/pom.xml b/pregelix/pregelix-runtime/pom.xml
index d12cb36..1c414ff 100644
--- a/pregelix/pregelix-runtime/pom.xml
+++ b/pregelix/pregelix-runtime/pom.xml
@@ -42,6 +42,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-clean-plugin</artifactId>
+				<version>2.5</version>
 				<configuration>
 					<filesets>
 						<fileset>