Xcelium support

[powARman]

Added support for Cadence Xcelium simulator which is the successor of incisive.

• Extended incisive.py to support xcelium simulator and maintain backwards compatibility with incisive
• Support vunit options disable_ieee_warnings and vhdl_assert_stop_level
• Fix compile issues in log_deprecated_pkg.vhd
• Fix problems running the test suite (spaces in path)

[LarsAsplund]

@powARman Question about Incisive and Xcelium. Is it a use case where you have both an old Incisive license and a new Xcelium licence. In that case you might want to run parallel simulations using both licenses. You could do that by setting VUNIT_SIMULATOR to two different simulators for the two test (suites). Now they are handled as one and the same

[rodrigomelo9]

Hi @powARman news about this PR? I am using Xcelium at work and I want to introduce Vunit to perform TDD. I am new at Vunit, and I will try with specifying incisive as the simulator, but may be useful to try this PR? Please, let me know