Drop setcap on python binary

This is a bit of a security issue, also we don't seem to need it anymore
since we have long switched to running under python3 and the setcap
doesn't have any effect anyway. It will also break deployments once we
drop installing python2 completely, so just remove it now.

Change-Id: I7265c525f1091012011ba12d65e9669a826ab979

devstack/plugin.sh

@@ -238,10 +238,6 @@ function create_designate_pool_configuration {
 
 # init_designate - Initialize etc.
 function init_designate {
-    # Some Designate Backends require mdns be bound to port 53, make that
-    # doable.
-    sudo setcap 'cap_net_bind_service=+ep' $(readlink -f /usr/bin/python)
-
     # (Re)create designate database
     recreate_database designate utf8
 
@@ -259,12 +255,9 @@ function install_designate {
         install_apache_wsgi
     fi
 
-
-    if is_ubuntu; then
-        install_package libcap2-bin
-    elif is_fedora; then
+    if is_fedora; then
         # bind-utils package provides `dig`
-        install_package libcap bind-utils
+        install_package bind-utils
     fi
 
     git_clone $DESIGNATE_REPO $DESIGNATE_DIR $DESIGNATE_BRANCH