Fix #34, Updates CLA information for Apache 2.0

Deletes old LC CLAs, Removes language in contributing.md of app-specific CLA, Adds link to new CLAs in pull_request_template.md and contributing.md

Checklist (Please check before submitting)

[x] I reviewed the Contributing Guide.
[x] I signed and emailed the appropriate Contributor License agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

Testing performed Visually inspected links in fork and in PR template.

Expected behavior changes All references to CLAs should be updated to the cFS app CLA.

System(s) tested on Google Chrome browser

Additional context None

Contributor Info - All information REQUIRED for consideration of pull request Justin Figueroa, ASRC Federal

nasa / LC