Updated gradle CI build.

Author: manastalukdar

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 #distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-bin.zip
-distributionUrl=https\://services.gradle.org/distributions-snapshots/gradle-6.1-20191003140431+0000-bin.zip
+distributionUrl=https\://services.gradle.org/distributions-snapshots/gradle-6.0-20191004135652+0000-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists