Allow the database type used by PAS to be either internel or external

[jgeorge300]

Thanks for contributing to pcf-pipelines. To speed up the process of reviewing your pull request please provide us with:

• A short explanation of the proposed change: Make the PAS database type configurable.

• An explanation of the use cases your change solves: pcf-pipelines is hard coded to use the external database only. Some environments use the internal database. This PR makes the database type configurable for either external (default) or internal.

• Expected result after the change: Allows the user to use the internal database if they so chose. If the user makes no change, defaults to current selection of external.

• Current result before the change: Unable to use internal database.

• Links to any other associated PRs or issues:

• [X ] I have viewed signed and have submitted the Contributor License Agreement

• [X ] I have made this pull request to the master branch

• [X ] I have run all the unit tests

[cf-gitbot]

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[calebwashburn]

Thanks for the pull request but we are in process of revisiting how these tasks will work in the future. To support both terraform and/or other iaas paving solutions. We will ensure the future solution accounts for this requirement.