limit for the amount of collected power profiling data added to test config validation and duration for test stop script is now logged in dispatcher

binary patching moved into separate function, now both symbols (FLOCKLAB_NODE_ID and TOS_NODE_ID) are patched

setup and cleanup time converted from minutes to seconds, guard time config for resource allocations removed (unused)

- start time for power profiling service changed to UNIX timestamp and <profConf> removed
- don't trigger archiver when results directory doesn't exist
- support for power profiling <fileFormat> tag added
- voltage channels are now subtracted (csv format only)
- XML template adjusted (only one occurrence of <profConf> accepted, new tags added)
- missing checks added testconfig validator for new power profiling <offset> and <duration> tags
- minor cleanup