Stop verifying opcode results in dry_run mode
Stop verifying opcode results in dry_run mode

Commit 1ce03fb1 (“Add ht-based result checks to opcodes”) introduced
infrastructure for checking opcode results, and subsequent commits
improved the list of opcodes which do declare a result, however this
was not tested for dry-run mode operation.

Furthermore, there's no authoritative list of which opcode/LUs support
dry_run mode at all; currently, this is based/restricted on the list
of CLI options, so… for now we disable the result verification if the
opcode has been executed in dry_run mode.

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

andir/ganeti,andir/ganeti,apyrgio/snf-ganeti,yiannist/ganeti,dimara/ganeti,mbakke/ganeti,mbakke/ganeti,leshchevds/ganeti,grnet/snf-ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/ganeti,andir/ganeti,onponomarev/ganeti,mbakke/ganeti,onponomarev/ganeti,leshchevds/ganeti,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,apyrgio/snf-ganeti,ganeti/ganeti,grnet/snf-ganeti,yiannist/ganeti,apyrgio/ganeti,bitemyapp/ganeti,bitemyapp/ganeti,ganeti/ganeti,dimara/ganeti