FASTFarm: OutAllPlanes output can fail

[ebranlard]

Bug description
There are several issues that can potentially affect the outputs for OutAllPlanes:

• When using polar grid, the velocity components are not included in the VTK (all zero).
• The OpenMP for loop around the WD_CalcOutput is problematic for the GetNewUnit function, and results in the same units being used at the same time.
• A small issue in how we handle the variable p%OutFileRoot. This variable should be replaced by the basename for the output to work correctly. It shouldn't be an issue if FAST.Farm is called from the command line though with a relative path to the input file.

Workaround
Run a FAST.Farm executable that does not have OpenMP, use the cartesian formulation, and make sure you call the exe as follow:
FAST.Farm.exe inputfile.fstf .

OpenFAST Version
at least 3.5.0

[ebranlard]

Fixed in rc-3.5.1