Support OAuth for calling services

[ebruchez]

+1 from customer

Here is an example of service.

[ebruchez]

In the example linked:

• the SearchService uses a Client Credentials Grant grant type and does not require user interaction
• the other AccountService, SubscriptionService, and UpdateService require user interaction and uses a Authorization Code Grant

[ebruchez]

Useful links:

• The OAuth 2.0 Authorization Framework
• Google OAuth Client Library for Java

[ebruchez]

Customer confirming that the Client Credentials Grant is what's needed for their service.

[ebruchez]

Suggestion: option to choose, in the Service Editor, among oauth profiles defined in properties.

[avernet]

+1 from customer

[ebruchez]

+1 from customer