ceph-dev-*build: sudo -E for container build

ceph-dev-*build: sudo -E for container build

We need the environment, or else

+ sudo CI_CONTAINER=true SHA1=ca338cb74a4f503555323a668a2ba5b2e1845057 /bin/bash ./contrib/build-push-ceph-container-imgs.sh
+ CI_CONTAINER=true
+ true
+ CEPH_BRANCH=
+ for v in BRANCH SHA1 CONTAINER_REPO_HOSTNAME CONTAINER_REPO_ORGANIZATION CONTAINER_REPO_USERNAME CONTAINER_REPO_PASSWORD
+ require BRANCH
+ [[ -z '' ]]
+ echo 'Required variable BRANCH not set, exiting'
Required variable BRANCH not set, exiting

Signed-off-by: Sage Weil <sage@redhat.com>