docs.yaml should install deps from test-datastax-requirements.txt

Author: aboudreault

docs.yaml

@@ -13,7 +13,7 @@ sections:
     directory: docs
     virtualenv_init: |
       set -x
-      CASS_DRIVER_NO_CYTHON=1 pip install -r test-requirements.txt
+      CASS_DRIVER_NO_CYTHON=1 pip install -r test-datastax-requirements.txt
       # for newer versions this is redundant, but in older versions we need to
       # install, e.g., the cassandra driver, and those versions don't specify
       # the cassandra driver version in requirements files