Helper methods (ie custom methods on a persistent) should not be callable via set() or get() even
if they start with set_ or get_. They are not the same as custom getters and setters for real persistent
properties.

I missed all the entry pages when converting from set_abc() and get_abc() to set('abc', ) and get('abc').

Also fixed a wrong namespace for core_competency\external\performance_helper

The setters and getters for the path property in the test class need to be protected.

Use \blah::class instead of '\\blah' in define_class functions.
Allow chaining of setters by returning $this.

(and setters).

Remove the magic getters and setters from persistent. They are deprecated only in the persistent
class for competencies.

This unit test is not really verifying that internally igbinary
in being used but just igbinary availability and, by double
serializing, that it works for a semi-complex object.

The test will be skipped if igbinary is not available.

Sadly the js arguments object gives an arguments.length of 1 when
no arguments are passed, so we have to explicitly check for it.

On Exiting scrom activity, it goes back to course
and scrolls to section. On slow machines next step
fails. To avoid such case navigate to home screen
and then follow next step.