NOJIRA: Changes to comments in local-settings.xml.
PAHMA-660: Rename host-settings.xml to host-settings-sample.xml.
PAHMA-660: Add comments to host-settings-sample.xml, and change settings to match defaults.
PAHMA-660: Add tomcat-main/src/main/resources/tenants/pahma/host-settings.xml to .gitignore.