Allow storing database password in environment variables

This patch allows to store and get database password from
environment variables. This is needed if we want to send those
variables by helm secrets.

Issue-ID: OOM-2287
Change-Id: I041c3e4dd3b9042b2b6c2b34afc22867bab81b22
Signed-off-by: Dominik Mizyn <d.mizyn@samsung.com>
2 files changed