Fix name of logged rpm list file

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Log number of written rpm packages only when there is at least one

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Revers order we wait for nexus events/tasks

Since is more likely for events to fire up tasks

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5487] Add IT checking that yum metadata is rebuilt when a directory containing RPMs is deleted

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>