Add Organization's Basic Capabilities Config Options

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Add the Capabilities for Organizations for basic operations. In particular, add support for:

• Manage CAs. If turned on, the admins in the organization can create/edit/delete CAs that are owned by the organization. If turned off, the organization's admins will not be able to manage the CAs withing the organization: Global Administrators will be required for this task.
• Manage Users. If turned on, the admins in the organization can create/edit/delete Users that can be registered for this organization. If turned off, the organization's admins will not be able to manage users: Global Administrators will be required for this task (i.e., create a user and assign one or more organizations to her)