refs #9549. Regression test demonstrates failure.
refs #9549. Regression test fixed.
refs #9549. Extend solution to scaling RHSWS
refs #9549. Extend tests for multithreaded zero search
refs #9549. Protect against bad scale factors.
refs #9549. Change warning conditions
refs #9549. Unused var removed.
Fix input scalefactor value for case when manual value is not used.

The algorithm now requires the scalefactor to be greater than zero so
even if it is not used the value must still satisfy the validator.
Refs #9549
Merge remote-tracking branch 'origin/feature/9549_stitch1d_defects'