Fixed: removed the caret sign from oms-api in package.json file, used oms-api version 15.0 and passed token in client method as required in oms-api v15(#726)

Fixed: removed the caret sign from oms-api in package.json file, used oms-api version 15.0 and passed token in client method as required in oms-api v15(#726) #2157