repository: refactoring gandalf related settings
repository: rename public-host to rw-host
repository: rename GitServerUri to GitServerURL
repository: rename GetReadOnlyUrl to ReadOnlyURL
repository: rename GetUrl to ReadWriteURL
etc: update config examples to match new gandalf settings
testing: fix git related hooks
app/testdata: update settings
app: fix code that used the old repository api
api/testdata: update gandalf related configuration
api: fix code that used old repository api
deploy: fix code that used old repository api
provision/docker: fix code that used old repository api
provision/juju: fix code that used old repository api
docs/config: add documentation for new gandalf related settings