As a workflow designer I want to be able to lock a document to a user based upon metadata set against the document.

E.g. If the document is for work package 1 then lock it to the Architect.

This is effectively a corollary to the distribution matrix but for document locking.

Requirements

1. Add a new lock matrix section to the lock document service task.

   1. Indicate how many rows have been configured.

2. Either a single role OR a matrix may be configured. Not both:

   1. If "Lock to" is blank, there must be a row in the lock matrix.

   2. If the lock matrix is empty, there must be a "Lock to" value.

3. The lock matrix shall be similar to the distribution matrix, the differences are:

   1. A document may only be locked to a single role. (The first matching role will be applied. This is different from the distribution matrix.)

   2. The only fields for each set of criteria are:

      1. "Lock to"