BRANCH 4.1:   added SQLServer specific statement for dropping NOT NULL constraint
BRANCH 4.1:
  added SQLServer specific statement for dropping NOT NULL constraint

Southpaw-TACTIC/TACTIC,southpawtech/TACTIC-DEV,mwx1993/TACTIC,hsuchie4/TACTIC,hsuchie4/TACTIC,southpawtech/TACTIC-DEV,CeltonMcGrath/TACTIC,talha81/TACTIC-DEV,talha81/TACTIC-DEV,diegocortassa/TACTIC,hsuchie4/TACTIC,talha81/TACTIC-DEV,sadanandb/pmt,CeltonMcGrath/TACTIC,Southpaw-TACTIC/TACTIC,sadanandb/pmt,diegocortassa/TACTIC,talha81/TACTIC-DEV,southpawtech/TACTIC-DEV,sadanandb/pmt,mwx1993/TACTIC,Southpaw-TACTIC/TACTIC,CeltonMcGrath/TACTIC,sadanandb/pmt,CeltonMcGrath/TACTIC,hsuchie4/TACTIC,southpawtech/TACTIC-DEV,diegocortassa/TACTIC,Southpaw-TACTIC/TACTIC,mwx1993/TACTIC,mwx1993/TACTIC,hsuchie4/TACTIC,sadanandb/pmt,Southpaw-TACTIC/TACTIC,talha81/TACTIC-DEV,southpawtech/TACTIC-DEV,southpawtech/TACTIC-DEV,mwx1993/TACTIC,Southpaw-TACTIC/TACTIC,talha81/TACTIC-DEV,diegocortassa/TACTIC,hsuchie4/TACTIC,CeltonMcGrath/TACTIC,mwx1993/TACTIC,diegocortassa/TACTIC,diegocortassa/TACTIC,CeltonMcGrath/TACTIC