- reformatted source code

- added more comments
- need to catch exception by reference, else the message seems to be lost
- test if the message is correct
- test if device is really closed and opened again
- changed names of status variables in control system to match the general naming conventions

enclose CMAKE_BUILD_TYPE in quotes; this transforms it into an wmpty
string and the string command wont complain that its missing an argument
when CMAKE_BUILD_TYPE is not set.

connect the deviceError module with the control system - otherwise it crashes due to an unconnected variable

- use latest backend factory interface and the CDD
- changed code formatting

Cmake treats CMAKE_BUILD_TYPE string as case insensitve. Make the check
for enabling coverage reflect this to make usage less restrictive.

Do not try to make consuming control system variables bidirectional. It was running into an assertion and anyway makes no sense.

fix issue that a double "-l" can appear in the Makefile config shell scripts for libraries which already contain the -l

do not create TestableModeAccessorDecorator for unidirectional PVs with both directions enabled (was hitting an assert)

- treat the two directions of bidirectional variables properly in testable mode (i.e. as individual variables with each one counter)
- fix a data race in testable mode in case a bidirectional variable rejected a value (was not holding a required lock)