[Satelltie 6] When sync a repository the old 'updateinfo.xml.gz' metadata does not remove.

Issue

• When sync a repository on Red Hat Satellite the old '*.updateinfo.xml.gz' metadata does not remove and same slowly leak diskspace (/var/lib/pulp ).

I.e.

- Before repository Sync:

[root@satellite ~]# ls /var/lib/pulp/published/yum/master/yum_distributor/Default_Organization-Red_Hat_Enterprise_Linux_Server-Red_Hat_Enterprise_Linux_7_Server_-_Optional_RPMs_x86_64_7Server/1455093381.96/repodata/ | grep updateinfo | wc -l
41

- After repository sync:

[root@satellite yum]# ls /var/lib/pulp/published/yum/master/yum_distributor/Default_Organization-Red_Hat_Enterprise_Linux_Server-Red_Hat_Enterprise_Linux_7_Server_-_Optional_RPMs_x86_64_7Server/1455248661.16/repodata/ | grep updateinfo | wc -l
42

[root@satellite ~]# df -kh /var/lib/pulp
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-var  300G  225G   76G  75% /var/lib/pulp