KRACOEUS-7867: Fix errors in RegEx validation expressions

Fix errors in DD files for format validation:

1) validCharactersConstraint parent should be ValidCharactersConstraint and not JavaClassPatterConstraint;

2) Some validation patterns for Award Number had incorrectly specified 3 digits after the dash.
To be honest I only checked those in the original JIRA, under the assumption that others were working in 5.2.1. I can try these out before we merge.