Commit b8d98a57643d1b94b531ab600fd707e4a3ab8c8c moved code
out of transactions to unblock the gate. This issues has been
resolved in the following:
1. Commit 61d0082f9ae9f9a935b5c3517c0b9036c40dbb00
2. Commit 72a2e9df96998f2198b2aba44e4daa2b466b1158
This also fixes dns transaction issues
Switch of context to admin context under db writer is causing
issues with table constraints.
Some usage of admin context for dns is still in place due to
extend_port_dict external API
Co-Authored-By: Anna Khmelnitsky <akhmelnitsky@vmware.com>
Change-Id: I21ec2df09c6b375973ce6f19e06e88318cf19452
bf3bbb5c4c