Change ignore-linter option to use camel case names

Change the `--ignore-linter` option to use the camel case form of linter
names (e.g. `DeclaredNameLinter` instead of `declared_name_linter`).

Change-Id: Ic4994ed6834d51b1e8f760a110c842b608ea8898
Reviewed-on: https://gerrit.causes.com/27624
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Kim Douglas Clarence Mason <kim.mason@causes.com>