Ignore spack folders when running pytests

Author: tdrwenski

.pytest.ini

@@ -1,5 +1,5 @@
 [pytest]
-addopts = --ignore=blt --ignore=uberenv_libs
+addopts = --ignore=blt --ignore=uberenv_libs --ignore=.spack_env --ignore=spack
 
 markers =
     regression: mark a test as a regression test