Add <Project>_SHOW_MACHINE_LOAD_IN_TEST and print CTest props for TAAT() (PHI Kanban #3330)

I did two things here:

1) Added new global option <Project>_SHOW_MACHINE_LOAD_IN_TEST that when
ON/TRUE will result in the machine load being printed (uptime) for each
TEST_<IDX> block for TAAT() tests.

2) Printing the CTest properties PROCESSORS and TIMEOUT in the CTest output.

Build/Test Cases Summary
Enabled Packages: TriBITS, CTeuchos, COBRA_TF
0) MPI_DEBUG => passed: passed=318,notpassed=0 (2.42 min)
1) SERIAL_RELEASE => passed: passed=311,notpassed=0 (2.19 min)
Add .gitdist.default for TriBITSDoc repo (TriBITS #26)
Merge branch 'master' of github.com:TriBITSPub/TriBITS