Change XML element name from noCheckpoint to RevertDefaultSnapshot and fix if statement logical error in function DoApplyCheckpoint.
Change XML element name from noCheckpoint to RevertDefaultSnapshot and fix if statement logical error in function DoApplyCheckpoint.

lixuemin2016/lis-test,adriansuhov/lis-test,LIS/lis-test,HuijingHei/lis-test,bogdancarpusor/lis-test,ilenghel/lis-test,bogdancarpusor/lis-test,HuijingHei/lis-test,mihaico/lis-test,mihaico/lis-test,ampintilie/lis-test,ilenghel/lis-test,adriansuhov/lis-test,chvalean/lis-test,HuijingHei/lis-test,adriansuhov/lis-test,ampintilie/lis-test,bogdancarpusor/lis-test,lixuemin2016/lis-test,senugala/lis-test,LIS/lis-test,LIS/lis-test,senugala/lis-test,chvalean/lis-test,chvalean/lis-test,ilenghel/lis-test,ampintilie/lis-test,ilenghel/lis-test,adriansuhov/lis-test,lixuemin2016/lis-test,mihaico/lis-test,senugala/lis-test,LIS/lis-test,HuijingHei/lis-test,chvalean/lis-test,lixuemin2016/lis-test,ampintilie/lis-test