Split resulting test jar into small ones (1000 files per jar)

Dex on teamcity has memory problems with large jar

compiler/android-tests/android-module/build.gradle

@@ -64,12 +64,27 @@ android {
 
     dexOptions {
         dexInProcess false
-        javaMaxHeapSize "700m"
+        javaMaxHeapSize "300m"
         //default is 4 and Total Memory = maxProcessCount * javaMaxHeapSize
-        maxProcessCount 2
+        maxProcessCount 1
+        additionalParameters "--debug"
     }
 }
 
+task jarTestFolders() {
+    println "Jar folders..."
+    new File("${projectDir}/libs/").listFiles().each { File file ->
+        if (file.isDirectory()) {
+            println "Jar '${file.name}' folder..."
+            ant.jar(basedir: "libs/${file.name}/", destfile: "libs/" +  file.name  + ".jar")
+        }
+    }
+}
+
+tasks.withType(JavaCompile) {
+    compileTask -> compileTask.dependsOn jarTestFolders
+}
+
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     androidTestCompile 'junit:junit:4.12'