* influxdb module: add postStart * cadvisor module: increase TimeoutStartSec Under high load, the cadvisor module can take longer than the default 90 seconds to start. This change should hopefully fix the test on Hydra.
Data from the documentation example[1] was used. [1] https://docs.influxdata.com/influxdb/v1.0/guides/writing_data/ [Bjørn: change commit message.]
