Implement MkUser.organizations()
Add MkUserTest
#828 Changes for qulice
#828 Changes for qulice
#834 Implemented multithreading lock tests in MkStorageTest
Revert "#828 Changes for qulice"

This reverts commit 03099386894070b8ee69e85efabdb079b15aeabe.
#828 Restore unit test
Merge pull request #837 from carlosmiranda/834

#837: pull request #834 Implemented multithreading lock tests in MkStorageTest
#828 Change test to use hamcresr]t
Merge pull request #835 from hildo/iss828

#835: pull request Iss828