Disable progress bar when running occ web executor

[PVince81]

While testing #355 I saw a lot of these in the web UI's update log:

Checking updates of apps
Checking whether the database schema for <activity> can be updated (this can take a long time depending on the database size)

�[1A oc_activity 
0/2 [>---------------------------] 0% 
�[1A oc_activity 
1/2 [==============>-------------] 50% 
�[1A oc_activity_mq 
2/2 [============================] 100% 
Checking whether the database schema for <dav> can be updated (this can take a long time depending on the database size)

�[1A oc_addressbooks 
0/10 [>---------------------------] 0%
�[1A oc_addressbooks 
1/10 [==>-------------------------] 10%
�[1A oc_cards 

@VicDeo we should run occ in a mode that disables progress bars for a better output.

CC @DeepDiver1975

[PVince81]

@VicDeo a quick one if you have some time on the side...