try to force JDK 7 with maven-compiler-plugin

Author: dnolen

pom.template.xml

@@ -244,6 +244,15 @@
                     <keyname>Clojure/core</keyname>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>1.7</source>
+                    <target>1.7</target>
+                </configuration>
+            </plugin>
         </plugins>
     </build>