Cleanup of Russian translation ...

Fixes Russian translation after the merge of community-provided changes in https://github.com/jenkinsci/jenkins/commit/7828dcb46d9a18f88cc8e71046edc9ee91ed95e6.

Initial version had some abuse words, typos, obvious grammatical and semantic errors, etc. 
I hope that new version will be better.

More info: https://groups.google.com/forum/#!topic/jenkinsci-dev/JXvazIROoQg


Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>