Rename syndesis-verifier - the repository - to a more generic name

[zregvart]

We need verifier and metadata in the same micro-service, we should rename syndesis-verifier to a more general purpose name.

See syndesisio/syndesis-rest#524

[rhuss]

I'd like to go with syndesis-connectors and merge this repo into https://github.com/syndesisio/connectors. However, I wonder whether we should wait when we move everything to https://github.com/syndesisio/syndesis ?

Naming would affect the image name (also the productised images, where we might have to issue a new image request probably). Not so trivial, I guess.

[rhuss]

One idea is to rename syndesis-verifier to syndesis-connectors (for the service and image name), would like to keep it as short as possible.

The directory in syndesis would be called connectors and the current verifier would live e.g. in connectors/service and the real connectors in connectors/impl/ or so.