Fix the helm install failed

Fix the helm install failed

The Helm install will fail if the persistent volume is not enabled.

This commit addresses this issue. If the persistent database
is disabled, Helm will install successfully.

Test Plan:
1. Set the persistent database to true, and verify that the persistent
   volume works correctly.
2. Set the persistent database to false, and verify that Helm installs
   correctly.

Issue-ID: INF-465
Change-Id: I2f3f483ccac5386b8746e259d601fab8385073f7
Signed-off-by: Zhang Rong(Jon) <rong.zhang@windriver.com>