Yang Wang 428fd7218c
Use asterisk instead of empty string to clear all cached entries (#63907) (#63989)
The officially supported way to clearing all entries from a cache is to use 
wildcard of either * or _all. Though empty string has the same effect, it was
never intended. Therefore the tests should not use empty string and this PR
changes them to use *.
2020-10-21 23:14:01 +11:00
..