fixed another uncought exception when converting e.g. an Inf from double to float (was still occurring for D_spectrum)

Do not stop server (even through assert -> undefined behaviour without Debug flags!) when trying to create a string array. Instead the property is simply ignored and a warning is printed.

Temporary roll-back to the periodic update polling instead of the readAny()-based update logic. This is necessary, since the readAny() implementation seems to be too slow for bigger servers like the LLRF server. A proper solution should be found to improve the performance of readAny() for larger number of variables.

removed the not necessary experimental switch. The readAny in control system adapter does not have the flag because it is the default behaviour

- fixed last tests which were not using timeout based checks

introduced flag to indicate when doocs initialisation is done. Removed all sleeps in the server based tests.

Removed update functions completely. The long sleep made the server unresponsive. Instead the call to run update in the tests was replaces with a sleep. Sometimes fails, as expected with a fixed timeout, but it was as hack anyway.

changed updater to run in its own thread. Tests still using doocs update, which is just doing an insanely long sleep of 1 second.

separated DoocsSpectrum into header and cc file, as it should be. It was still header only from the time where it was a tempates class.

all EqFcts are using common updater. Tests passing, but locking is not done properly across EqFcts (race conditions with RPC calls possible).

testing that re-using variables inside one location works. Across locations does not work yet, needs refactoring.

changed DoocsFactory to not create unnecessary decorators of the wrong type when auto-creating variables. Test for spectra still failing

Updater is using a vector of callbacks now. Not working as intended because there are different decorators where they should be the same.

removed obsolete duplicate test from the xml parser test. duplicates are possible and sometimes useful (?)

library compiles and tests are passing, except for duplicate test which has to be adapted and is not implemented yet