update test dependencies

* org.mockito:mockito-core :: 1.9.5 -> 2.4.2
* org.testng:testng :: 6.8.7 -> 6.10

Author: agebhar1

build.gradle

@@ -69,12 +69,12 @@ dependencies {
     compile(group: "com.googlecode.libphonenumber", name: "libphonenumber", version: "8.0.0");
     compile(group: "com.google.code.findbugs", name: "jsr305", version: "3.0.1");
     compile(group: "net.sf.jopt-simple", name: "jopt-simple", version: "5.0.3");
-    testCompile(group: "org.testng", name: "testng", version: "6.8.7") {
+    testCompile(group: "org.testng", name: "testng", version: "6.10") {
         exclude(group: "junit", module: "junit");
         exclude(group: "org.beanshell", module: "bsh");
         exclude(group: "org.yaml", module: "snakeyaml");
     };
-    testCompile(group: "org.mockito", name: "mockito-core", version: "1.9.5");
+    testCompile(group: "org.mockito", name: "mockito-core", version: "2.4.2");
     testCompile(group: "org.easytesting", name: "fest-assert", version: "1.4");
 }