Adjust the CA SDF to not constrain PVs to its prefix.

• Remove the prefix from the parsing of the req file.
• Add a target to build the sequencer to the cmake, for testing purposes.
• Add some parsing logic to the req file parser to detect and skip burt headers

Closes #369 (closed)

assigned to @david.barker and @erik.vonreis

merged

mentioned in commit fb919117

mentioned in merge request !322 (merged)

mentioned in commit ff6fbcc3