Merge branch 'release/1.6.7' into develop
Fix pb loading worker

Worker has a dependancy with the server source in singletonstats module.
Detach the singletonstats (and the singletonconfig server specific
settings) by creating a new DispatcherBaseResource dedicated to the
dispatcher which will be in charge of getting stats data.
Worker will then use the default BaseResource.
Merge branch 'hotfix/correct_env_in_command' into develop
Better scale

- switch on dev env
- fix time scale with wrong alignment
Change scale in stats viewer

- change creation of scale TODO: have a real value scale
- add reset action in viewer
Set cron and script for prod env

- grab stats set on aviator root's crontab
- change launch scripts
- adapt display_stats to have better visualisation of server stats
- fix icon pb in statsviewer
Merge branch 'feature/better_stats_time_scale' into develop
Remove debug print
Fix err in stats
Update crontab calls
Fix release licence webservice

FIXED: The WS to release a licence was using the rendernode name instead of the rn object.Only the license count was changed.
FIXED: When releasing license at the end of the command, the license count was change even if RN was not found in list.
Update version number: 1.6.8

Add filters to pul_query:
- startTime
- endTime
Merge branch 'release/1.6.8'