Add missing space for gcp pip3 install command (#802)

Author: lhp-nemlig

kvirt/common/__init__.py

@@ -2382,7 +2382,7 @@ def install_provider(provider, pip=False):
         if not pip:
             warning("Using pip as this is the only way for this provider")
         cmd = 'pip3 install google-api-python-client google-auth-httplib2 google-cloud-dns google-cloud-storage'
-        cmd += 'google-cloud-compute google-cloud-container'
+        cmd += ' google-cloud-compute google-cloud-container'
     elif provider == 'ibm':
         if not pip:
             warning("Using pip as this is the only way for this provider")