Added support to FullprofPolynomial.  Refs #8332.
Fixed a bug in unit test.  Refs #8332.
Removing white space in read in parameter name.  Refs #8332.
Fixed type.  Refs #8332.

1. Fixed the reported typo.
2. Replace background type string by string constant
Added unit test for background type.  Refs #8332.
Enabled and fixed 2 unit tests.  Refs #8332.
Changed string consts to capitals. Refs #8332.
Merge remote-tracking branch 'origin/feature/8332_lebail_fppoly'