Chris Green dd27662b40 Enable testing in parallel when using CMake. (#8484) ... * Add 'extra_env' argument to Executable.__call__: this will be added to the environment but does not affect whether the current environment is reused. If 'env' is not set, then the current environment is copied and the variables from 'extra_env' are added to it. * MakeExecutable can take a 'jobs_env' parameter that specifies the name of an environment variable used to set the level of parallelism. This is added to 'extra_env' (so does not affect whether the current environment is reused). * CMake-based Spack packages set 'jobs_env' when executing the 'test' target for make and ninja (which does not use -j)		2018-09-04 11:37:19 -07:00
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spack	Enable testing in parallel when using CMake. (#8484)	2018-09-04 11:37:19 -07:00