Downgrade jacoco to 0.7.4.201502262128 as a workaround for 'stuck in endless loop' issue

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=151554130

build.gradle

@@ -19,8 +19,15 @@ buildscript {
         classpath 'com.android.tools.build:gradle:2.3.0'
         classpath 'com.android.tools.build:gradle:2.3.0'
         classpath 'com.novoda:bintray-release:0.4.0'
         classpath 'com.novoda:bintray-release:0.4.0'
     }
     }
+    // Workaround for the following test coverage issue. Remove when fixed:
+    // https://code.google.com/p/android/issues/detail?id=226070
+    configurations.all {
+        resolutionStrategy {
+            force 'org.jacoco:org.jacoco.report:0.7.4.201502262128'
+            force 'org.jacoco:org.jacoco.core:0.7.4.201502262128'
+        }
+    }
 }
 }
-
 allprojects {
 allprojects {
     repositories {
     repositories {
         jcenter()
         jcenter()

library/core/build.gradle

@@ -30,11 +30,9 @@ android {
     }
     }
 
 
     buildTypes {
     buildTypes {
-        // Re-enable test coverage when the following issue is fixed:
-        // https://code.google.com/p/android/issues/detail?id=226070
-        // debug {
-        //     testCoverageEnabled = true
-        // }
+        debug {
+            testCoverageEnabled = true
+        }
     }
     }
 }
 }