ARMADA-239: Documentation for validation error codes for Armada
3 of 3 commits (Inital Setup and Remaining Exceptions are in seperate commits)
-guide-exceptions.rst contains the files to include in the documentation.
-docs/.../exceptions files contains the format and content of the documenation.
-armada/exceptions files were modified in their comments in order to utilize the
sphinx-directed method.
Please Note: If the exception is not raised anywhere, it is not included in the
documentation.
Change-Id: Ie093cb3252b199bfc7fcd62284501e573d89ed8a