Use consistent naming for initialisms in internal/tunnel
requested to merge gitlab-community/cluster-integration/gitlab-agent:fix-initialisms-in-internal-tunnel-1 into master
Improve naming for initialisms ( #468 (closed)) in internal/tunnel. To avoid creating a big MR, only the following changes have been included:
- Rename mockApi to mockAPI
- Rename tunsByAgentId totunsByAgentID
- Rename agentId2tunInfo to agentID2tunInfo
- Rename agentId to agentID
- Rename kasUrlsC to kasURLsC
- Rename setKasUrls to setKASURLs
- Rename kasUrls to kasURLs