Adds mongodb test for combination conditions
Adds more mongodb tests for combination conditions
Changes mongodb build and condition, fixes #2868
Improves mongodb nested and in condition test
Update README.md

Typo fix
Merge pull request #2908 from joseph-kuruvilla/patch-1

Update README.md
Merge pull request #2909 from dirx/2868-mongob-combined-conditions

Changes building of mongodb and conditions & fixes #2868