Only initialize store once on launch

The store is initialized twice from the cli. First in init_store and
then once again in run_stream. Since we are using init_store for our
initialization we might just as well use that only.

Remove the initialization and deinitialization code from run_stream.
This means that init_store will have to be split into two so that we can
deinitialize the store without reinitializing it.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>