Wrong usage of "a"

Wrong usage of "a" in the mesages:
"This condition is to test for a entry"
"Creating a image"
"Waits for a interface to reach a given status."

Should be:
"This condition is to test for an entry"
"Creating an image"
"Waits for an interface to reach a given status."

Totally 3 occasions in Tempest base code.

Change-Id: I7c84ea3477bc02006a881981db77fdcf1f61a935
3 files changed