[Spring Cloud Config Server] making use of b64enc function to encrypt the plain text into base64 w…

[Anurag-30]

…hile installing the chart

What this PR does / why we need it:

This PR is to encypt the plain text values sent to secrets using base64 at the time of installing the chart

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

Helm chart failing with error validating "": error validating data: [unknown object type "nil" in Secret.data.gitPassword, unknown object type "nil" in Secret.data.gitUsername]

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• [ ] DCO signed
• [ ] Chart Version bumped (if the pr is an update to an existing chart)
• [ ] Variables are documented in the README.md
• [ ] Title of the PR starts with chart name (e.g. [fluentd-elasticsearch])