Upgrade to OkHttp 2.7 and TestNG 6.9.10

Author: jhoeller

build.gradle

@@ -59,7 +59,7 @@ configure(allprojects) { project ->
 	ext.jtaVersion           = "1.2"
 	ext.junitVersion         = "4.12"
 	ext.nettyVersion         = "4.0.33.Final"
-	ext.okhttpVersion        = "2.6.0"
+	ext.okhttpVersion        = "2.7.0"
 	ext.openjpaVersion       = "2.4.0"
 	ext.poiVersion           = "3.13"
 	ext.protobufVersion      = "2.6.1"
@@ -69,7 +69,7 @@ configure(allprojects) { project ->
 	ext.slf4jVersion         = "1.7.13"
 	ext.snakeyamlVersion     = "1.16"
 	ext.snifferVersion       = "1.14"
-	ext.testngVersion        = "6.9.9"
+	ext.testngVersion        = "6.9.10"
 	ext.tiles2Version        = "2.2.2"
 	ext.tiles3Version        = "3.0.5"
 	ext.tomcatVersion        = "8.0.30"