Reapply commit 2a6de57 after merge
Reapply commit 2a6de57 after merge

In the last merge I erroneously discarded the changes introduced by
commit 2a6de57 "Check the results of master IP RPCs". This commit
reintroduces them.

Signed-off-by: Andrea Spadaccini <92d490849ac1b40cd8e8878e4d94603bebdb089f@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

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