Allow undefined properties in Profile document

[jaimecasero]

Uncomment only one, leave it on its own line:

/kind feature
Allow to store undefined data in ProfileDocument to be consumed by third party systems

What happened:
Profile schema validation forbids to add unexpected/unstructure parts to the profile doc.

What you expected to happen:
Adding properties at the profile Doc level out of known sections,should allow the profile to be stored, and later rertrieved.
How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Restcomm Connect version (from startup logs):
• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Deployment method (e.g. docker-compose, with linked docker-compose.yml file,
  or application server info + deployment option):
• Others: