Fix for STORE-1321: Define new method(getSortingNames) in RxtManager class to  retrive the sortable attribute names for given RXT type
Fix for STORE-1321: Define new method(getSortingNames) in RxtManager class to  retrive the sortable attribute names for given RXT type

prasa7/carbon-store,prasa7/carbon-store,Rajith90/carbon-store,cnapagoda/carbon-store,madawas/carbon-store,madawas/carbon-store,daneshk/carbon-store,daneshk/carbon-store,cnapagoda/carbon-store,jeradrutnam/carbon-store,splinter/carbon-store,wso2/carbon-store,thushara35/carbon-store,splinter/carbon-store,Rajith90/carbon-store,thushara35/carbon-store,daneshk/carbon-store,jeradrutnam/carbon-store,thushara35/carbon-store,Rajith90/carbon-store,cnapagoda/carbon-store,splinter/carbon-store,madawas/carbon-store,jeradrutnam/carbon-store,prasa7/carbon-store,wso2/carbon-store,wso2/carbon-store