Update database servers group in apps_groups.conf (#8004)

- added group for column oriented databases - `columndb`
- added `clickhouse-server` to group `columndb`
- added influxd to `timedb` group

collectors/apps.plugin/apps_groups.conf

@@ -109,7 +109,8 @@ puma: *puma*
 
 sql: mysqld* mariad* postgres* postmaster* oracle_* ora_*
 nosql: mongod redis* memcached *couchdb*
-timedb: prometheus *carbon-cache.py* *carbon-aggregator.py* *graphite/manage.py* *net.opentsdb.tools.TSDMain*
+timedb: prometheus *carbon-cache.py* *carbon-aggregator.py* *graphite/manage.py* *net.opentsdb.tools.TSDMain* influxd*
+columndb: clickhouse-server*
 
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 # email servers