FindSherpa.cmake Improvement, 1.0 branch (2020.06.03.)

Made FindSherpa.cmake add the Sherpa executables to the PATH environment variable. Did this simply by setting up the SHERPA_BINARY_PATH cmake variable based on the location of the Sherpa(-config) executable(s).

This is necessary to avoid hardcoding the location of Sherpa-config into our C++ code at build time.

Cc. @cgutscho

mentioned in merge request !684 (merged)

AE Build SUCCESS
Build logfiles are available at Jenkins [AE-MERGE-REQUEST-V1-CC7 #17]

merged

mentioned in commit eac70d12