[yang] remove mistakenly added parameter for 'get_module_name' (#2193)

#### What I did
Revert parameter from function that was mistakenly added in #2118

We don't need to pass 'sonic_yang_options' to static function get_module_name()

#### How I did it
remove 'sonic_yang_options' from SonicYang object creation in get_module_name()

config/config_mgmt.py

@@ -281,7 +281,7 @@ def get_module_name(yang_module_str):
         """
 
         # Instantiate new context since parse_module_mem() loads the module into context.
-        sy = sonic_yang.SonicYang(YANG_DIR, sonic_yang_options=self.sonicYangOptions)
+        sy = sonic_yang.SonicYang(YANG_DIR)
         module = sy.ctx.parse_module_mem(yang_module_str, ly.LYS_IN_YANG)
         return module.name()
 

tests/config_mgmt_test.py

@@ -11,6 +11,7 @@
 config_mgmt_py_path = os.path.join(os.path.dirname(__file__), '..', 'config', 'config_mgmt.py')
 config_mgmt = load_module_from_source('config_mgmt', config_mgmt_py_path)
 
+model = "module test_name {namespace urn:test_urn; prefix test_prefix;}"
 
 class TestConfigMgmt(TestCase):
     '''
@@ -22,6 +23,13 @@ def setUp(self):
         config_mgmt.DEFAULT_CONFIG_DB_JSON_FILE = "portBreakOutConfigDb.json"
         return
 
+    def test_config_get_module_check(self):
+        curConfig = deepcopy(configDbJson)
+        self.writeJson(curConfig, config_mgmt.CONFIG_DB_JSON_FILE)
+        cm = config_mgmt.ConfigMgmt(source=config_mgmt.CONFIG_DB_JSON_FILE)
+        assert cm.get_module_name(model) == "test_name"
+        return
+
     def test_config_validation(self):
         curConfig = deepcopy(configDbJson)
         self.writeJson(curConfig, config_mgmt.CONFIG_DB_JSON_FILE)