Merge pull request #1451 from Sanil15/SAMZA-2608

SAMZA-2608: Updating the RocksDb version for Samza 1.6 release
diff --git a/gradle/dependency-versions.gradle b/gradle/dependency-versions.gradle
index 28acb2a..60e7766 100644
--- a/gradle/dependency-versions.gradle
+++ b/gradle/dependency-versions.gradle
@@ -44,7 +44,7 @@
   metricsVersion = "2.2.0"
   mockitoVersion = "1.10.19"
   powerMockVersion = "1.6.6"
-  rocksdbVersion = "6.5.3"
+  rocksdbVersion = "6.6.4"
   scalaTestVersion = "3.0.1"
   slf4jVersion = "1.7.7"
   yarnVersion = "2.7.1"