Change-Id: I672d6fea935cbe7416ebd0cfff5006fddb9cd534
Partially-implements: blueprint better-reconfigure

Change-Id: I00d2dcb0895548ba169ab85764cf546c2214cbf5

Change-Id: Ic2ad2b38d7e1c988f9dca9dc0d377cfee7b89504
Partially-implements: blueprint condition-pre-check

* Merge prechecks.yml and site.yml playbook
* Create empty precheck.yml into all roles.

Change-Id: I8a138558a26c0a2a66c5fd48ed37be657c99c1dd
Implements: blueprint condition-pre-check

do_reconfigure.yml is introduced to use serial directive. But we use
it in wrong. Now serial has moved to playbook file. So it is time to
remove the do_reconfigure.yml file

Closes-Bug: #1628152
Change-Id: I8d42d27e6bc302a0e575b0353956eaef9b2ca9fd

beacause upgrade is not required to re create the database

TrivialFix

Change-Id: Ia0a776ecef61f80450edce093ac631b092532fc7

Added ansible role to deploy grafana

Added host group for grafana deployment

Co-Authored-By: zhubingbing <zhubingbing10@gmail.com>

Change-Id: I3dec4e8586b6f65fa7de66a48506d1c79de2fe1e
Partially-Implements: Blueprint performance-monitoring