fix java test projects in local tests

Author: Heliozoa

tmc-langs-java/tests/data/ant_project/nbproject/project.properties

@@ -38,8 +38,8 @@ javac.compilerargs=
 javac.deprecation=false
 javac.processorpath=\
     ${javac.classpath}
-javac.source=1.6
-javac.target=1.6
+javac.source=1.7
+javac.target=1.7
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}:\

tmc-langs-java/tests/data/maven_exercise/pom.xml

@@ -21,8 +21,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.3</version>
                 <configuration>
-                    <source>1.6</source>
-                    <target>1.6</target>
+                    <source>1.7</source>
+                    <target>1.7</target>
                 </configuration>
             </plugin>
             <plugin>