Implement FindForeignKeyConstraintsGenerator for Firebird (CORE-2070)
Bugfix FindForeignKeyConstraintsGenerator for Firebird (CORE-2070)

TRIM() is needed, was missed in the initial commit.
Merge pull request #317 from MHWallaby/CORE-2070

Implement FindForeignKeyConstraintsGenerator for Firebird [CORE-2070]