This change adds an implementation of the config hints for both versions
of the vanilla plugin.
Changes
* adding confighints_helper module to hold utility functions for
creating the config hints
* adding edp engine for v2_6_0
* adding specific config hints functions for both vanilla edp_engine
versions
* adding tests for vanilla config hints and hints helper
Change-Id: I3ae0eb94d380195708b1d4ca8f479dacf345212b
Partial-Implements: bp edp-job-types-endpoint
2d0952cd40