cv_regress script to generate regressions for Siemens verification manager tool

Created by: XavierAubert

Added the needed templates to allow the generation of a RMDB File.

Due to limitations of Questa Vrun, make sure to generate the rmdb file with coverage enabled, as the regression tool is not able to easily detect a failing make command as a test fail. It needs indeed to have access to an .ucdb file with the test status recorded inside.

Also, Siemens tools expects one unique "testname" when merging ucdb, so tests that are executed with multiple configurations and seeds provoked an issue when merging. I was forced to update some coverage commands and script to solve this.

I also updated one small thing to cv_regress script, to allow the same test to be executed in multiple configurations inside the same regression. That will be useful for handling all F/Zfinx tests that will be practically the same inside one unique regression.