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1. Use the initial Ownership Transfer session even after setting-up
   the Owner Credential, when onboarding Servers based on OCF 1.0 -
   rather than closing that session and establishing a new one.

2. Posting the Owner Credential ACL might fail for older Servers.
   In that case, close the initial Ownership Transfer session and
   establish a new session, for compatibility with those older
   Servers.

Change-Id: If242c0af4ec05ad9ca144c274ee5385bc7738d92
Signed-off-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17279Reviewed-by: Kevin Kane <kkane@microsoft.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>