Need to install from local deps first.

The `pip install --upgrade` still is needed to ensure
freshness but by removing the filesystem paths from deps
we made the initial install grab from PyPI (by mistake).
This way, all local package deps are grabbed from
the local filesystem.

Author: dhermes

packages/google-cloud-runtimeconfig/tox.ini

@@ -6,6 +6,7 @@ envlist =
 localdeps =
     pip install --quiet --upgrade {toxinidir}/../core
 deps =
+    {toxinidir}/../core
     pytest
 covercmd =
     py.test --quiet \
@@ -16,7 +17,6 @@ covercmd =
 
 [testenv]
 commands =
-    {[testing]localdeps}
     py.test --quiet {posargs} unit_tests
 deps =
     {[testing]deps}
@@ -25,7 +25,6 @@ deps =
 basepython =
     python2.7
 commands =
-    {[testing]localdeps}
     {[testing]covercmd}
 deps =
     {[testenv]deps}