eassylogging log format

[George Merticariu]

Now that we have eassylogging integrated in rasdaman we should proceed in increasing the quality of the log files. Below is the initial plan on how the logging config should be.

Each component should have it's own configuration file. In order to minimize the number of config files we can reduce the to two files:

a) client logging - rasql, directql, other clients.
b) server logging - rasserver, rasmgr

Client logging:

• prints to console (i.e. outstream)
• Format: "%level - %msg"

• Levels: Fatal, Error, Warning, Info

Server logging:

• prints to file
• Format: "%level - %datetime, %loc, %func: %msg"
• Levels: Fatal, Error, Warning, Info, (conditional) Debug, (conditional) Trace

The files should be created in <rasdaman_inst>/etc and should be used to configure the loggers on runtime.