Added particle restart case for fixed_source runs
Fixed the fixed_source seed and updated the tests
Merge branch 'develop' into restart_fixed
Corrected tests for fixed_source particle restarts
Use different stream for source sampling

This commit makes it easier for eigenvalue and fixed source runs to use the same seeds when sampling sources.
Merged 'develop' and updated tests (except CMFD)
Added test for particle restart with fixed source
Updated CMFD tests for restart_fixed
Removed unnecessary whitespace
Renamed tests part_restart to particle_restart
Merge branch 'develop' into restart_fixed

Conflicts:
	src/CMakeLists.txt
Fix metastable isotopes and Am-242 in cross_sections_nndc.xml.
Fix some metastables in cross_sections_serpent.xml.
Merge branch 'develop' into restart_fixed

Conflicts:
	src/CMakeLists.txt
Merge branch 'develop' into fix-nndc-xs
Check for proton, deuteron, triton, 3he, and alpha level cross sections with no
redundant total.
Expand list of reaction MTs that are checked.
Fix initialization issues for pseudorandom number streams.

The `stream` variable is now threadprivate and both `stream` and `prn_seed` are initialized inside an OpenMP parallel region so that all threads have appropriate values.
Merge remote-tracking branch 'upstream/develop' into restart_fixed

Conflicts:
	tests/test_tally_assumesep/results_true.dat
Merge remote-tracking branch 'paulromano/patch-1' into restart_fixed