Update to new test runner and espresso.

test runner 0.6-alpha and espresso 2.6-alpha have fixed the issue
with broken @UIThreadTest annotation. This change moves support
library to use these versions.

Bug: 29547049
Change-Id: I3d53e2594871461d4f293713a3637395afc43d3e
diff --git a/v7/appcompat/build.gradle b/v7/appcompat/build.gradle
index 9edd016..45ec21f 100644
--- a/v7/appcompat/build.gradle
+++ b/v7/appcompat/build.gradle
@@ -7,10 +7,10 @@
     compile project(':support-vector-drawable')
     compile project(':support-animated-vector-drawable')
 
-    androidTestCompile ('com.android.support.test:runner:0.4.1') {
+    androidTestCompile ("com.android.support.test:runner:${project.rootProject.ext.testRunnerVersion}") {
         exclude module: 'support-annotations'
     }
-    androidTestCompile ('com.android.support.test.espresso:espresso-core:2.2.1') {
+    androidTestCompile ("com.android.support.test.espresso:espresso-core:${project.rootProject.ext.espressoVersion}") {
         exclude module: 'support-annotations'
     }
     androidTestCompile 'org.mockito:mockito-core:1.9.5'