Generate password for wsrep user
Generate password for wsrep user

* Generate password for wsrep user which is used for galera replication.

Partial-Bug: 1373630
Change-Id: I8025f7272d428d120044c899034d9fbecf8215cc
Signed-off-by: Sergii Golovatiuk <98168b9e97e341cddc0074e7bec42876c0bd6617@mirantis.com>

zhaochao/fuel-web,zhaochao/fuel-web,nebril/fuel-web,huntxu/fuel-web,huntxu/fuel-web,prmtl/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,stackforge/fuel-web,nebril/fuel-web,eayunstack/fuel-web,prmtl/fuel-web,eayunstack/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,zhaochao/fuel-web,zhaochao/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,zhaochao/fuel-web,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,huntxu/fuel-web,nebril/fuel-web,eayunstack/fuel-web,stackforge/fuel-web,nebril/fuel-web,SmartInfrastructures/fuel-web-dev,huntxu/fuel-web