Fix Huawei HVS driver attaching volume error

If iSCSI initiator is not added to host, we will get https errors
for we find the initiator info by sending url with this initiator name.

This patch fixes the way of getting the initiator info.
First, get the all initiator info.
Then, find the one we need by name.

Closes-bug: #1230296
Change-Id: I92620374923fa136ee71fe6eb3af6e4c78a3d66b

cinder/tests/test_huawei_hvs.py

@@ -331,6 +331,9 @@ def call(self, url=False, data=None, method=None):
             if url == "iscsi_initiator/":
                 data = """{"error":{"code":0}}"""
 
+            if url == "iscsi_initiator":
+                data = """{"error":{"code":0}}"""
+
             if url == "mappingview":
                 self.termin_flag = True
                 if method is None:

cinder/volume/drivers/huawei/rest_common.py

@@ -758,29 +758,31 @@ def _delete_associated_lun_from_lungroup(self, lungroupid, lunid):
 
     def _initiator_is_added_to_array(self, ininame):
         """Check whether the initiator is already added in array."""
-        url = self.url + "/iscsi_initiator/" + ininame
+        url = self.url + "/iscsi_initiator"
         data = json.dumps({"TYPE": "222", "ID": ininame})
         result = self.call(url, data, "GET")
         self._assert_rest_result(result,
                                  'Check initiator added to array error.')
 
-        if "data" in result and result['data']['ID']:
-            return True
-        else:
-            return False
+        if "data" in result:
+            for item in result['data']:
+                if item["ID"] == ininame:
+                    return True
+        return False
 
     def _is_initiator_associated_to_host(self, ininame):
         """Check whether the initiator is associated to the host."""
-        url = self.url + "/iscsi_initiator/" + ininame
+        url = self.url + "/iscsi_initiator"
         data = json.dumps({"TYPE": "222", "ID": ininame})
         result = self.call(url, data, "GET")
         self._assert_rest_result(result,
                                  'Check initiator associated to host error.')
 
-        if "data" in result and result['data']['ISFREE'] == "true":
-            return True
-        else:
-            return False
+        if "data" in result:
+            for item in result['data']:
+                if item['ID'] == ininame and item['ISFREE'] == "true":
+                    return False
+        return True
 
     def _add_initiator_to_array(self, ininame):
         """Add a new initiator to storage device."""