set compile target 1.6 which is minimum for spring 4

Author: davidkarlsen

pom.xml

@@ -25,7 +25,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <project.build.java.target>1.5</project.build.java.target>
+        <project.build.java.target>1.6</project.build.java.target>
         <spring.framework.version>4.0.0.RELEASE</spring.framework.version>
         <slf4j.version>1.7.5</slf4j.version>
         <javadocPluginVersion>2.9.1</javadocPluginVersion>