change assert(Not)Equals to assert(Not)Equal

According to http://docs.python.org/2/library/unittest.html
assert(Not)Equals is a deprecated alias of assert(Not)Equal.

Change-Id: I2e518d3a92e11e06bacaa67076c0d60ee82ab4a9
Co-Authored-By: Jesse Keating <omgjlk@us.ibm.com>
diff --git a/tests/unit/test_merger_repo.py b/tests/unit/test_merger_repo.py
index f815344..8aafabf 100644
--- a/tests/unit/test_merger_repo.py
+++ b/tests/unit/test_merger_repo.py
@@ -65,12 +65,12 @@
             os.path.join(self.workspace_root, 'subdir', '.git')),
             msg='Cloned over the submodule placeholder')
 
-        self.assertEquals(
+        self.assertEqual(
             os.path.join(self.upstream_root, 'org/project1'),
             work_repo.createRepoObject().remotes[0].url,
             message="Parent clone still point to upstream project1")
 
-        self.assertEquals(
+        self.assertEqual(
             os.path.join(self.upstream_root, 'org/project2'),
             sub_repo.createRepoObject().remotes[0].url,
             message="Sub repository points to upstream project2")