Test forwarding arrays
Created by: matthew-d-jones
Closes #34 (closed) (DM-1864 also resolved by updating softioc)
- Adds system test for forwarding arrays.
- Adds unit test and fix for forwarding PVA array updates.
- Set initial values of PVs in a "setup" function during system tests, so that they are independent of initial value set in the softioc.
- softioc container was updated to remove SCAN field from the arrays, which was making it difficult to test.