agent: fix arguments to vdsClient migrate invocation

The run_vds_client_command() function expects a boolean parameter for
ssl state but was being sent a text string, causing migration to fail.

Change-Id: I25aaaa3d6cc32a8e36e6366a24cf2db43c0039b0
Bug-Url: https://bugzilla.redhat.com/1015721
Signed-off-by: Greg Padgett <gpadgett@redhat.com>