[BUGFIX] Initialize arguments correctly in routing related ViewHelpers

Being initialized with the correct default value of an empty array
the Viewhelper no longer leads to a fatal error if called without
the argument "parameters".

Additionally the argument "route" is marked as required.

Resolves: #86576
Releases: master
Change-Id: I3457b4292d4409826250d4c5b1ec53d087b2bd95
Reviewed-on: https://review.typo3.org/58579


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Rudy Gnodde <rgn@windinternet.nl>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Tested-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: Mathias Brodala <mbrodala@pagemachine.de>