[CDSK-935] Create a mechanism to change stylesheet between staging and production

[Mowinski]

I've created a mechanism to switch between two different schemas in CSS.

On staging before starting katana must set KATANA_CONFIGURATION on staging value.

Staging:

Production:

[coveralls]

Coverage increased (+0.0002%) to 68.627% when pulling 2bb30ac on cdsk-935-environment-stylesheet into ed375ba on staging.

[coveralls]

Coverage increased (+0.005%) to 68.632% when pulling 3ad19bb on cdsk-935-environment-stylesheet into ed375ba on staging.

[campos-ddc]

I think we should use BuildmasterConfig to set this option, instead of environment variables.

We always start Katana through our buildmaster repo, that contains a master.cfg file:

https://ono.unity3d.com/katana/buildmaster/files/259aaeafa03ce798a02424326b380e3b8160ad5e/master.cfg

Notice that we set a bunch of variables (such as c['slaves'], c['title'], etc) and some of them are imported from a buildmaster_configuration` module. This module is where we keep all differences between staging and production (by keeping separate branches): https://gitlab.internal.unity3d.com/CDS/Katana/buildmaster_configuration

Ideally, this UI configuration should be in that repo, and be passed to Katana through master.cfg in buildmaster

[Mowinski]

I've added a new option to master.cfg file. You can set a different color schema by setting in config file this attribute c['environment'] = 'production' or c['environment'] = 'staging'. What do you think about this solution?

Should I add this field to master.cfg in buildmaster config repository?

[warcholprzemo]

Do we get rid of the developer color? For me it's ok, just asking.

EDIT: Ah, I've figured out that if we setup c['environment'] = '' in master.cfg we can see dev mode :-)
If we put c['environment'] = 'production' we can see production colors. Good job 👍

[campos-ddc]

@Mowinski yes, that would be great

master.cfg in buildmaster should have a c['environment'] = serversetting.get_environment(), while the actual production/staging string should be set in this file:

https://gitlab.internal.unity3d.com/CDS/Katana/buildmaster_configuration/blob/master/buildmaster_configuration/serversettings.py

With different values for the staging and master (production) branches