Spawn thread for lookup command as well

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Spawn thread for delete command as well

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
No need to explicitly return ok here

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Re-use supervisor's pid instead of getting it everytime

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Make call creation to run in the dedicated thread to avoid blocking

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>