Connection managers now use thread pools of minimum 2 threads (instead of 4). Default - a number of cores.
UIConnection manager of agents use now only 2 threads.
### DDS common
Fixed: a bug, which prevented log files to rotate.

### dds-user-defaults
Modified: default log level is 1 (instead of 0).
Modified: default log rotations size in MB instead of bytes. (default is 10 MB).