Merge pull request #70 from Ranjith15/obsplatform-2.02

db script changes
new sale enhances
Merge remote-tracking branch 'upstream/obsplatform-2.02' into obsplatform-2.02
quantity greatr than zero
Merge pull request #72 from Rakeshadlagatta/obsplatform-2.02

New sale enhances
..
Merge remote-tracking branch 'upstream/obsplatform-2.02' into obsplatform-2.02