Exclude i686 rpms in our centos mirrors

For some reason the x86_64/ directories of centos mirrors contain i686
packages too. Since none of our systems rely on i686 lets go ahead and
exclude these packages entirely. This should save quite a bit of disk
space (almost halving the required disk space?).

Change-Id: I146765da021e8436365e39a6dca4db470a07fe81

playbooks/roles/mirror-update/files/centos-mirror-update

@@ -64,6 +64,7 @@ $K5START ${RSYNC} \
     --exclude="images/" \
     --exclude="isolinux/" \
     --exclude="ppc64le*" \
+    --exclude="*.i686.rpm" \
     --exclude=".*" \
     $MIRROR $BASE/8-stream
 
@@ -96,6 +97,7 @@ for REPO in $REPOS; do
     --exclude="isolinux/" \
     --exclude="paas" \
     --exclude="*/drpms" \
+    --exclude="*.i686.rpm" \
     $EXTRA_OPTS \
     $MIRROR_PATH $BASE/$REPO/
 

playbooks/roles/mirror-update/files/centos-stream-mirror-update

@@ -58,6 +58,7 @@ $K5START ${RSYNC} \
     --exclude="s390x" \
     --exclude="source" \
     --exclude="ppc64le" \
+    --exclude="*.i686.rpm" \
     $MIRROR ${BASE}/9-stream
 
 #