helm_release_exists reports a false match.

[Scott Little]

Brief Description
-----------------
Failed to start a second minikube environment.
The issue appears to be that my project name was a
substring of the other pre-existing project.
Function helm_release_exists() was seeing a false match.

Severity
--------
Minro

Steps to Reproduce
------------------
On a single host, under a single user id, using different
MINIKUBE home and name, try to set up two minikube work environments
using project names 'deb' and 'deb2'.

Expected Behavior
------------------
both environments can be established

Actual Behavior
----------------
One fails to establish

Reproducibility
---------------
100%

System Configuration
--------------------
N/A

Branch/Pull Time/Commit
-----------------------
March 4, 2022

Last Pass
---------
N/A

Timestamp/Logs
--------------
N/A

Test Activity
-------------
Build

Workaround
----------
use totally unique project name, not a substring of another.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/tools/+/832143
Committed: https://opendev.org/starlingx/tools/commit/9847046042730da8df002b3e0495e05429a007f6
Submitter: "Zuul (22348)"
Branch: master

commit 9847046042730da8df002b3e0495e05429a007f6
Author: Scott Little <email address hidden>
Date: Fri Mar 4 16:01:32 2022 -0500

    helm_release_exists: require exact projectname match

    While trying to get two minikube environments working
    simultaneously on a single host, one issue I hit was
    that one project name was a substring of the other.
    helm_release_exists() was seeing a false match.

    Modify helm_release_exists() to require an exact match
    of the project name.

    Closes-Bug: 1964378
    Signed-off-by: Scott Little <email address hidden>
    Change-Id: Iea311f6675b8c2fb4a77ad0265fe71caf473a521