Bring MWTransclusion example data out of the stone age

The example data still used the old format for data-mw that predates
support for multi-template transclusions in Parsoid. The old format
has now been retired, and any attempt to interpret it will cause
JS errors.

Also removed data-parsoid from most of these examples while I was
at it.

Change-Id: I2b7816b7edc580cec0ed29fb166458351a0c6ed3
Merge "Bring MWTransclusion example data out of the stone age"