Add LogSizeChecker
Add jobs/LogSizeChecker.py which checks the size of a log and verifies that the size is growing as it should. (The log is expected to grow due to heartbeat submissions.)
This has been tested and seems to be working. One can look at files in /var/sigsumchecker/log_size_check/ on the server to see the files created by this check, and how those files are updated every hour.