[STORAGE] refactored syntax: get close to PEP8
[STORAGE] fixed impossibility to retrieve group 'guest' from the storage layer
[TESTS] update tests to comply with the new getGroup() storage method
Merge pull request #163 from FenixXx/release-1.10

[STORAGE] fix impossibility to retrieve group 'guest' from the storage layer
update version to R21
admin.yell is back since R21

- remove changes from ca533a24226ca557aa2245c98ab3d7f0d9e43293
use 'teamFactionOverride' instead of teamXFactionOverride'

vars.team1FactionOverride, ..., vars.team4FactionOverride was in R19 replaced by 'vars.teamFactionOverride'
Merge pull request #164 from ozon/improvements/bf4_parser

[BF4] R21
XLRstats v3.0.0-beta.3 - Moved minPlayers checking to XLRstats plugin, obsoleted the subPlugin: XLRstatsControllerPlugin
[TESTS] fix mysql test database name cannot be changed
[TESTS] add Drone.io configuration file
[TESTS] fix xlrstats tests