test(mobilesecurityservice): add test to package (AEROGEAR-8950)

[craicoverflow]

Motivation

https://issues.jboss.org/browse/AEROGEAR-8950

What

Added unit tests to cover the mobilesecurityservice package. Reached 73.6% code coverage.

Why

Unit tests ensure that the code is fully tested and work as expected.

How

1. Referred to Operator SDK documentation
2. Referred to Operator SDK samples.

Verification Steps

Add the steps required to check this change. Following an example.

1. Run make test
2. Do the tests pass?
3. Confirm that the CircleCI build is passing: https://circleci.com/gh/aerogear/mobile-security-service-operator.

Checklist:

• Code has been tested locally by PR requester
• Changes have been successfully verified by another team member

Progress

• Finished task
• TODO

[damienomurchu]

Verified tests pass locally. Approving also as PR can be merged as-is & if anything else is need to satisfy the JIRA it can be added in another PR.