Fix version checking

Author: Gal Topper

clients/py/v3io_frames/grpc.py

@@ -250,7 +250,7 @@ def _check_version(self):
             server_version = server_version[1:]
         if resp.version:
             client_major_minor_version = __version__[:__version__.rfind(".")]
-            server_major_minor__version = server_version[:resp.version.rfind(".")]
+            server_major_minor__version = server_version[:server_version.rfind(".")]
             if client_major_minor_version != server_major_minor__version:
                 warnings.warn(
                     f"Warning - Server version '{server_version}' differs in major/minor version from client "

clients/py/v3io_frames/http.py

@@ -255,7 +255,7 @@ def _check_version(self):
             return
 
         client_major_minor_version = __version__[:__version__.rfind(".")]
-        server_major_minor__version = server_version[:resp.version.rfind(".")]
+        server_major_minor__version = server_version[:server_version.rfind(".")]
         if client_major_minor_version != server_major_minor__version:
             warnings.warn(
                 f"Warning - Server version '{server_version}' differs in major/minor version from client "