As a follow-on to Iba7739eada5711d9c269cb4127fa712e9f961695 in
devstack, where we rename the XTRACE storage calls to not conflict, do
the same in grenade
Also some minor turning-down of tracing when importing stackrc; it
floods the logs with irrelevant stuff. And now we're tracing
properly, cleanup "echo_summary" output in the logs.
Change-Id: Ibb67a6454e4465a8d0493461e32dbae96c6a03e7
d7e0a24bcc