misc: hasitem matcher was added
misc: recovery dc tests were largely refactored
doc: testcases' doc strings were corrected
fix: get rid of module level code execution
misc: testcases module was changed to get rid of excess manipulations with keys
fix: wrong indexes checking (dnet_recovery with -o and -f options)
misc: duplicated code was removed
misc: good/bad/broken keys were renamed to consistent/recovered/inconsistent
misc: address checking was refactored
fix: missed assignment for consistent keys was added
misc: indexes checking was corrected
tests: tests to check indexes were renamed
doc: comments were corrected
misc: unused imports were removed
misc: unused import was removed
fix: now we are checking indexes for recovered keys in available groups
Refactor recovery dc tests

* complex list comprehension was replaced with `if` statment + list
comprehension
* test documentation was corrected
Merge branch 'develop' into features/recovery-indexes-tests
Merge pull request #28 - recovery tests with indexes