Configure default quota for a Space

[kobergj]

As a user with the permission to "set space quota" I want to configure a default quota for new Spaces which will be used when a user with a role that has the permission to "create spaces" provisions a Space. The idea behind the default quota is to allow Space provisioning without the permission to "set space quota" while maintaining a leverage on the storage usage.

AC

• The default value for the default quota is "1 GB"
• The default can be changed by configuration
• Unlimited quota is only possible if the default is empty AND the Request has an empty/non-existung quota attribute
• Possible values for the default quota range from 0 to infinite (represented as "")
• There is no way to change existing quota values by changing the config value
• acceptance tests cover the implemented functionality

[kobergj]

#2619