AMBARI-6682. Add generate_config method to Script (aonishuk)

ambari-server/pom.xml

@@ -921,7 +921,7 @@
                 <argument>${custom.tests}</argument>
               </arguments>
               <environmentVariables>
-                  <PYTHONPATH>${project.basedir}/../ambari-agent/src/main/python:${project.basedir}/../ambari-common/src/main/python/jinja2:${project.basedir}/../ambari-common/src/main/python:${project.basedir}/../ambari-common/src/main/python/ambari_commons:${project.basedir}/../ambari-common/src/main/python/resource_management:${project.basedir}/../ambari-common/src/test/python:${project.basedir}/src/main/python:${project.basedir}/src/main/python/ambari-server-state:${project.basedir}/src/test/python:$PYTHONPATH</PYTHONPATH>
+                  <PYTHONPATH>${project.basedir}/../ambari-common/src/main/python:${project.basedir}/../ambari-agent/src/main/python:${project.basedir}/../ambari-common/src/main/python/jinja2:${project.basedir}/../ambari-common/src/main/python/ambari_commons:${project.basedir}/../ambari-common/src/test/python:${project.basedir}/src/main/python:${project.basedir}/src/main/python/ambari-server-state:${project.basedir}/src/test/python:$PYTHONPATH</PYTHONPATH>
               </environmentVariables>
               <skip>${skipTests}</skip>
             </configuration>

ambari-server/src/test/python/stacks/2.0.6/HDFS/test_hdfs_client.py

@@ -29,7 +29,7 @@ from stacks.utils.RMFTestCase import *
 @patch.object(tempfile,"mkdtemp", new = MagicMock(return_value='/tmp/123'))
 @patch.object(contextlib,"closing", new = MagicMock())
 @patch("os.path.exists", new = MagicMock(return_value=True))
-class TestDatanode(RMFTestCase):
+class Test(RMFTestCase):
 
   def test_generate_configs_default(self):
     self.executeScript("2.0.6/services/HDFS/package/scripts/hdfs_client.py",