This change updates the ETCD storage test so that its data is
exported.  Thus it can be used by other tests.  The dry run test was
updated to consume this data instead of having a duplicate copy.

The code to start a master that can be used for "one of every
resource" style tests was also factored out.  It is reused in the
dry run test as well.

This prevents these tests from drifting in the future and reduces
the long term maintenance burden.
Signed-off-by: Monis Khan <mkhan@redhat.com>