Bugs 1499, 1500: missing runtime components

Adding ca-certificates for SSL verification
Adding ssh cli as it is needed by something in LCM

Fixes Bug 1499
Fixes Bug 1500

Change-Id: Ib7fab398cf39fd577003cf5dd5ac48b8d1b70121
Signed-off-by: beierlm <mark.beierl@canonical.com>