Gitlab and Jira bridge: move credential loading and client creation from
`Init` to `ImportAll` in order to harmonize the behaviour of the
different bridges.
* Fix git config reader can't read values with spaces
* Add bug-id-revmap config option for the reverse map, and use this
in the importer
* Add NewImportWarning for things that aren't exactly errors.
Use this for unhandled changelog events.
* Add NewExportWarning for things that aren't exactly errors.
Use this for un-exportable status changes.
* Strip newlines from titles on import
* don't prefix imported title's with jira ID
* fix import new comment due to wrong variable name
* fix double import of comment edition due to improper err check
* fix JIRA cloud paginated changelog has a different JSON
field then the embedded changelog in the JIRA server issue
object
* fix splitting label strings yielded an empty string as a label
value
* Support both token and session credential types
* use getTimeDervedID in export.go
* keyOrigin -> core.KeyOrigin
* fix one indentation
* remove project key from operation metadata
* fix missing credentials codepath if not using sidecar
* return error, don't panic
* skipping status export is an error
* use switch in config.go
* move PromptPassword to input
* move client construction into getIdentityClient
* use non-pointer context throughout client since it is an interface
* remove some TODOs
* don't emit multiple nothing-events, just one per bug only if nothing
happened.
* rename EditBody to EditCreateComment
* add configuration notes about additional values
* store bug id map in a dictionary in the config
* some fixes from testing
