cam-app-example,test: Increase timeout_init_to_start for the streams

Currently the CI is spotting an intermittent issue where when two
applications are running at the same time, one of them is receiving
a "state init to start timeout" error.

This is due to the time taken by the cam-server to serve the
connections when multiple applications and streams are present, and
apparently the timeout_init_to_start needs to be relaxed when we
have two application.

This is a configuration side change, the numbers were computed when
only one application was running and because of the new requirement,
now we need to have a different set for them to handle also the
deployment of two applications at the same time.

Add word to the dictionary to please the spell checker.

Signed-off-by: Luca Fancellu <luca.fancellu@arm.com>