Issue 2423: Flag to enable mkdocs plugin (#2424)
Issue 2423: Flag to enable mkdocs plugin (#2424)

* Adds a flag to enable mkdocs plugin to generate site documentation.

Signed-off-by: Vijay Srinivasaraghavan <106eb5b2b1c0037d45353dab7675e8e8e6c5442b@emc.com>

pravega/pravega,pravega/pravega,pravega/pravega