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.

1) Some previous deprecations are removed to reduce the amount of
 code sent to the client
2) Other very-old functions are also sent to final deprecation

This is more agressive than our standard deprecation process, but with
the nature of this old js it seems the best way forward to reduce the
amount of obsolete js sent to clients.