Added MoorDyn support to FastFarmCaseCreation

[ombahiwal]

for issue #17

"Add support for MoorDyn"

following the same style of HydroDyn, and updated dict as template file params from the previous PR #36

• Added mDynfilename to the templateFiles dictionary.
• implemented functionality to copy and rotate MoorDyn configuration files based on unit test case needs.
• specifically, enabled rotation of MoorDyn anchor points to match inflow angles (inflow_deg) as part of FAST.Farm test setups.
• Updated the FFCaseCreation class to integrate MoorDyn.

Note:
Please note that the tests for MoorDyn rotation and copy are added as comments in test_moordyn_support.py in order to avoid pytest command from failing. As discussed earlier, I lack the domain knowledge for this module, I request you to check if the test case is appropriate with your template files. So, I suggest this PR could be taken to a dev branch to worked on later by a domain expert.

[rthedin]

Thanks @ombahiwal for this PR. We will hold off on this PR for now, as there is more comprehensive PR including support for MoorDyn (and HydroDyn and SeaState) -- PR #40. Some of the elements of this PR might be incorporated (like rotation of the mooring system).