Addressing comments and enhancing support

-Fixing Status Filter search
-Adding README.md to help future edits to the file
-Fixing the team filter for lower/upper case combinations

BUG=None
TEST=go/launchbugs?
- go/launchbugs?te=new
- go/launchbugs?m=105
- go/launchbugs?m=105&te=dhaddock
- go/launchbugs?team=corex
- go/launchbugs?team=corex&m=105
- go/launchbugs?&m=101&te=dhaddock&s=Fixed
- go/launchbugs?team=corex&m=101&te=sdantuluri&status=Fixed&c=OS>Systems>Update

Change-Id: I14a4e845cbe07ac5f8fff75ebd7e20efbd4090a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/3756204
Reviewed-by: David Haddock <dhaddock@chromium.org>
Tested-by: Wendy Aleman Martinez <awendy@chromium.org>
Reviewed-by: Wendy Aleman Martinez <awendy@chromium.org>
Commit-Queue: Wendy Aleman Martinez <awendy@chromium.org>
2 files changed