controller_ctx: fix Pylint warnings

Signed-off-by: Tucker Polomik <t.polomik@cablelabs.com>

controller_ctx.py

@@ -1,3 +1,5 @@
+# pylint: disable=too-few-public-methods
+
 """
 Module that represents a HTTP connection to a topology's Controller.
 """
@@ -6,9 +8,9 @@ from http_auth import HTTPBasicAuthParams
 class ControllerConnectionCtx():
     """Class to hold the connect to a EasyMesh topology's Controller.
     """
-    def __init__(self, ip: str, port: str, auth: HTTPBasicAuthParams) -> None:
+    def __init__(self, ip_addr: str, port: str, auth: HTTPBasicAuthParams) -> None:
         if not auth:
             raise ValueError("Passed a None auth object.")
-        self.ip = ip
+        self.ip_addr = ip_addr
         self.port = port
         self.auth = auth