Misspelling in message

Misspelling "separated" in the message :
"A list of backend names seperated by comma ."
Should be "A list of backend names separated by comma. "
Totally 1 occasion in Tempest base code

replace " ." also with ". " in this line, too.

Change-Id: I5f863247cc8d4171618a8948ea7daadc9fd84528
1 file changed