Stabilize cacheclean system test Closes #67 See merge request isc-projects/bind9!43 (cherry picked from commit643c8c27ff)01de79b3Assign an index to each check in the cacheclean system testaeea1fafDo not overwrite cache dumps2bbff06dWait until a cache dump completes instead of waiting for a fixed amount of timeca1049b2Improve the way cache contents are searched for "ns.flushtest.example"