Fluorine SR1 release [buffer]

This mainly involves pre and post release work for ODL Fluorine SR1. Once the release is approved by the TSC we have the release process as defined here [1.].

 [1.] https://docs.opendaylight.org/en/stable-fluorine/release-process/simultaneous-release.html

// This was the approved by TSC in mail thread (latest).  

TSC Approval latest:  [https://lists.opendaylight.org/pipermail/tsc/2018-November/010582.html
]Fluorine autorelease build = https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/autorelease-release-fluorine/275
staging repo=autorelease-2491
signed repo=autorelease-2508

// This was the approved during TSC meeting (outdated). 

TSC Approval:  https://meetings.opendaylight.org/opendaylight-meeting/2018/tsc/opendaylight-meeting-tsc.2018-11-08-16.59.html
Fluorine autorelease build = https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/autorelease-release-fluorine/260
staging repo =autorelease-2463
signed repo = autorelease-2506