testing: update test-run

* fix format_process function
* print whole reject file when test failed (#102)
* print reproduce file when test failed at -j -1 mode (#104)
* print reproduce file content in parallel mode (#104)
* allow to pass arguments to create_cluster
* allow grep_log to not reset search results after tarantool restart
* support comments in config files
* don't kill default if non-default crash expected (#109)
* don't inherit unneeded file descriptors (#117)
* list task for hung workers (#107)
* add new config param 'show_reproduce_content' (#113)

Author: Totktonada