Add a new model-level setting "replicationChunkSize" which allows
users to configure change replication algorithm to issue several
smaller requests to fetch changes and upload updates.
Notable side-effects:
- loopback no longer exports "caller" and "arguments" properties
- kv-memory connector is now properly added to the connector registry
- the file "test/support.js" was finally removed
The decision which Promise implementation to use should be made by
LoopBack user, not by the framework.
This commit moves Bluebird reference from lib/utils.js to
test/support.js.