bsc: Fix f_establish_fully() for cases where we expect ASSIGN FAIL

When f_ass_patch_lcls() was recently introduced during LCLS support
patches, we broke any testcases that *expected* an ASSIGNMENT FAIL
by overwriting the ASSIGNMENT FAIL with an ASSIGNMENT COMPL.

This patch fixes f_ass_patch_lcls() to only patch 'assignmentComplete'
members, if this assignmentComplete is actually chosen.

This fixes BSC_Tests.TC_assignment_fr_a5_1_codec_missing

Change-Id: I64fbf4cc3178a91913143960475a0d3758779ced
1 file changed