Damyon Wiese 56fa860ead MDL-53772 externallib: Fix busted webservices context handling
Fix:
$PAGE->context must be reset when calling validate_context

Improve:
Provide wrapper for calling an external function

The wrapper correctly checks the function parameters and return type against
the description of the external function, and stores the PAGE and COURSE global
state variables, restoring them before the function returns.

Fix: buggy unit tests.

These tests are expecting debugging from a bug that was fixed, and calling web
service functions with no user or session.
2016-04-14 13:58:23 +08:00
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