task/install: move package list to top of file

Signed-off-by: Sage Weil <sage@redhat.com>
task/install: install libcephfs-java (deb)

Accidentally removed in 0c75c6b1f7654b5a9b45d73c6b6aa47a523e1841

Signed-off-by: Sage Weil <sage@redhat.com>
Merge pull request #321 from ceph/wip-install

install libcephfs-java