Homogenize temporary file management

[Dimitar Misev]

Temporary files are created in various places, especially source:conversion, via mkstemp usually. Often they are created in cwd, but should be in /tmp.

The task is to search the code for mkstemp, and homogenize the temporary file creation. The temporary directory (/tmp default) should be defined in globals.hh or so.

[Peter Baumann]

further, all such files should sit in a directory clearly identifiable, such as /tmp/rasdaman.

Cream in the coffee: optional parameter to set this directory in the config file.

[Bang Pham Huu]

It looks like Vlad Zamfir has been doing with easylogging. May I take this ticket?

[Peter Baumann]

can we add a brief justification why it can be closed?

[Dimitar Misev]

I've fixed it already when refactoring source:conversion