CLONE - Data storage for a WD-schema running process

UPD: At present this improvenment is implemented for sequences because sequences in UGENE was switched to dbi using. Resolve this issue after implementing dbi using for other data types of UGENE.

Refactor the WD-core code for these changes:
1) a data storage should be created for one running workflow process
2) a data itself must not walk through the workflow data-channels, but a special id of the data should
3) the storage is an abstract interface and many implementations of that could exist (in memory, dbi-database). It provides putting, getting and deleting a data using data ids.