Use new officially supported way for local unit tests, many dependencies upgraded for this, temporary disabled separate debug builds

OpenKeychain/build.gradle

@@ -10,8 +10,18 @@ dependencies {
     compile 'com.android.support:appcompat-v7:22.1.1'
     compile 'com.android.support:recyclerview-v7:22.1.0'
     compile 'com.android.support:cardview-v7:22.1.0'
+    
+    // Local Unit tests with Robolectric
+    // https://developer.android.com/training/testing/unit-testing/local-unit-tests.html#run
+    // https://github.com/nenick/AndroidStudioAndRobolectric
+    // http://www.vogella.com/tutorials/Robolectric/article.html
+    testCompile 'junit:junit:4.12'
+    testCompile 'org.hamcrest:hamcrest-core:1.1'
+    testCompile 'org.hamcrest:hamcrest-library:1.1'
+    testCompile 'org.hamcrest:hamcrest-integration:1.1'
+    testCompile "org.robolectric:robolectric:3.0-rc3"
 
-    // UI testing libs
+    // UI testing with Espresso
     androidTestCompile 'com.android.support.test:runner:0.2'
     androidTestCompile 'com.android.support.test:rules:0.2'
     androidTestCompile 'com.android.support.test.espresso:espresso-core:2.1'
@@ -137,7 +147,7 @@ android {
             resValue "string", "tempstorage_authority", "org.sufficientlysecure.keychain.tempstorage"
         }
         
-        extra {
+        /*extra {
             applicationIdSuffix ".debug"
             
             // Reference them in the java files with e.g. BuildConfig.ACCOUNT_TYPE.
@@ -149,7 +159,7 @@ android {
             resValue "string", "account_type", "org.sufficientlysecure.keychain.debug.account"
             resValue "string", "provider_authority", "org.sufficientlysecure.keychain.debug.provider"
             resValue "string", "tempstorage_authority", "org.sufficientlysecure.keychain.debug.tempstorage"
-        }
+        }*/
     }
 
     /*