Replace Grizzly2 test container to Jetty test container

Grizzly2 test framework does not produce the same test results
compare to production REST API test through jetty web server.
By default Jersey 2.x uses the Grizzly2 test framework, this
commit tries to replace this test framework to Jetty based
http test framework.

Change-Id: I7bcb19bf73801cc66036487fd5a964e32ce1ba61
diff --git a/pom.xml b/pom.xml
index 247263b..8ed1665 100644
--- a/pom.xml
+++ b/pom.xml
@@ -261,7 +261,7 @@
             </dependency>
             <dependency>
                 <groupId>org.glassfish.jersey.test-framework.providers</groupId>
-                <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
+                <artifactId>jersey-test-framework-provider-jetty</artifactId>
                 <version>${jersey.version}</version>
                 <scope>test</scope>
             </dependency>