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.
I would definitely suggest trying these out. With the new checks, I am seeing that sometimes I have to add unnecessary parentheses around some parts of the regex to get it to pass.