Making the tox install of the gRPC extra quiet.

Author: dhermes

tox.ini

@@ -45,7 +45,7 @@ deps =
 basepython =
     python2.7
 commands =
-    pip install gcloud[grpc]
+    pip --quiet install gcloud[grpc]
     {[testenv]covercmd} --cover-min-percentage=100
 deps =
     {[testenv]deps}
@@ -107,7 +107,7 @@ passenv = {[testenv:system-tests]passenv}
 basepython =
     python2.7
 commands =
-    pip install gcloud[grpc]
+    pip --quiet install gcloud[grpc]
     python {toxinidir}/system_tests/attempt_system_tests.py
 setenv =
     PYTHONPATH =