Fixed a couple stpyfits tests that were failing due to stricter checking on the position of the EXTEND keyword.
Fixed a couple stpyfits tests that were failing due to stricter checking on the position of the EXTEND keyword.

git-svn-id: 6d9763a5a770351123389058c013888add577529@13884 fe389314-cf27-0410-b35b-8c050e845b92

spacetelescope/stsci.tools