Remove unused libs and upgrade version

app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "com.kunzisoft.keepass"
         minSdkVersion 14
         targetSdkVersion 25
-        versionCode = 1
-        versionName = "2.5.0.0beta1"
+        versionCode = 2
+        versionName = "2.5.0.0beta2"
 
         testApplicationId = "com.keepassdroid.tests"
         testInstrumentationRunner = "android.test.InstrumentationTestRunner"
@@ -58,7 +58,7 @@ def supportVersion = "25.4.0"
 def spongycastleVersion = "1.58.0.0"
 
 dependencies {
-    androidTestCompile files('libs/junit4.jar')
+    androidTestCompile "junit:junit:4.12"
     compile "com.android.support:appcompat-v7:$supportVersion"
     compile "com.android.support:design:$supportVersion"
     compile "com.android.support:preference-v7:$supportVersion"