[POLICY] Use common secret template in policy-api

Use common secret template in policy-api module instead of hardcoding db
credentials in config map.

For now db creds are hardcoded but will be remove in further commits.

Issue-ID: OOM-2342
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Change-Id: I6219a06ef466e214756302974589fcc27fa0a4cd
4 files changed