Add test dependencies

Change-Id: Ie5281df14a0f27067e62a7b9578c1b3c1271c46c
Reviewed-on: http://gerrit.dmdirc.com/3890
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

build.gradle

@@ -47,6 +47,9 @@ subprojects {
 
         compile group: 'com.google.code.findbugs', name: 'jsr305', version: '2.+'
         compile group: 'com.squareup.dagger', name: 'dagger-compiler', version: '1.2.1'
+
+        testCompile group: 'junit', name: 'junit', version: '4.+'
+        testCompile group: 'org.mockito', name: 'mockito-all', version: '1.+'
     }
 
     task copyPluginConfig(type: Copy) {