conman:  Don't export TRYING_OPEN status at startup.

The wcli0 status reflected provisioning having been started when the
provisioning ratchet is created.  The call to set step 0's status has
been moved out of reset (which is called by Ratchet.__init__) into
start, which calls reset and is only called by ConnectionManager when
it actually wants to start provisioning.

Change-Id: Iec3ccce28be61cf5ac12b9f1e21c37f75eea2796
4 files changed