QFJ-846 : update maven-compiler-plugin to 3.3 mistakely downgraded to 2.2

Author: lburgazzoli

pom.xml

@@ -73,7 +73,7 @@
 		<mainClass/>
 
         <maven-resources-plugin-version>2.7</maven-resources-plugin-version>
-        <maven-compiler-plugin-version>2.2</maven-compiler-plugin-version>
+        <maven-compiler-plugin-version>3.3</maven-compiler-plugin-version>
         <maven-jar-plugin-version>2.6</maven-jar-plugin-version>
         <maven-surefire-plugin-version>2.19</maven-surefire-plugin-version>
         <maven-pmd-plugin-version>3.5</maven-pmd-plugin-version>