Added table lock to sessions table.
Added table lock to sessions table.

1btcxe/wlox-api,bitdoviz/wlox-api,bitdoviz/wlox-api,wlox/wlox-api,bitdoviz/wlox-api,wlox/wlox-api,1btcxe/wlox-api,1btcxe/wlox-api,1btcxe/wlox-api,wlox/wlox-api,wlox/wlox-api,bitdoviz/wlox-api