Kilo.travis fix for docs.161

[ssorenso]

Fixing .travis.yml issues regarding docs

Issues:
WIP #161

Problem:

• Travis does not install the requirements.docs.txt prior to executing
  docs

Analysis:

• This change will have the travis instance install with -e ./
  • This will allow the importation of f5_heat

Tests:

• This is for the test suite.

[ssorenso]

@pjbreaux @jputrino Please review.

@jputrino, this should fix your docs problem.

[pjbreaux]

@ssorenso: look at the above message about kilo branch being out-of-date

[jputrino]

@ssorenso @pjbreaux I actually have a fix for this already in PR #162. The pip install has to happen in the docs test script because it runs in a container and doesn't have access to the requirements that we already installed in the travis build environment. I had it set up this way before, I just accidentally removed it when I was updating the script.

[ssorenso]

Will remove the PR then. Thanks to you both for the information.