ParserOutput::getText() is not a simple getter, but does
transformations on the "text" of the ParserOutput; the simple getter
is named ::getRawText().
To maintain consistency, rename ParserOutput::setText() to
::setRawText() and the property name ParserOutput::$mText to
::$mRawText so future readers are not confused.
The JSON property name as it appears in the serialized ParserCache
is left as 'Text' so that we don't have any forward- or backward-
rollback issues.
Change-Id: I3ef34814ab9473cc70d0a6806e8c5a4a02b73491
72c4945a72