Verified correct installation of plexapi in Travis

The missed dependency to the 'mock' package on Python 2.7 made it clear
that this went by undetected in the Travis runs.

This change updates the Travis control file to verify that the plexapi
package can be successfully imported after being installed from the
working directory using pip.

Because the installation of py.test drags in a lot of dependencies,
it was moved after the installation of plexapi.

Signed-off-by: Andreas Maier <[email protected]>

Author: andy-maier

.travis.yml

@@ -23,8 +23,10 @@ env:
 before_install:
   - pip install --upgrade pip
   - pip install --upgrade setuptools
-  - pip install --upgrade pytest pytest-cov coveralls
 install:
+  - pip install .
+  - python -c "import plexapi; print('installation ok')"
+  - pip install --upgrade pytest pytest-cov coveralls
   - pip install -r requirements_dev.txt
   - '[ -z "${PLEXAPI_AUTH_MYPLEX_USERNAME}" ] && PYTHONPATH="$PWD:$PYTHONPATH" python -u tools/plex-bootstraptest.py
      --destination plex --advertise-ip=127.0.0.1 --bootstrap-timeout 540 --docker-tag $PLEX_CONTAINER_TAG --unclaimed ||