Use .owner field for module, which own functions registered by structure

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Kernel's structures file_system_type and file_operations use 'struct module 
*owner' field for module, which owns functions set as callback in these 
structures.
KEDR structures 'kedr_payload' and 'kedr_functions_support' use 'mod' field for 
the same purpose.

I suggest to rename 'mod' to 'owner' in KEDR structures, as it reflects field 
purpose clearly and follows kernel conventions.

This renaming would require corresponded changes in KEDR-dependent projects, 
but it shouldn't be a big problem.

Original issue reported on code.google.com by [email protected] on 22 Jan 2015 at 1:33