Fix console mixed case optional value params

[Thinkscape]

This one slipped through.

When using optional value params in console routes, i.e.

do something [<withThisData>]

Given the following script invocation:

./zf2 do something "with foo"

We would receive the following route match:

// actual
[
  'withthisdata' => 'with foo'
]

Where it should be:

// expected
[
  'withThisData' => 'with foo'
]

Notice that withThisData parameter became lowercased withthisdata.

@weierophinney - we need to include a note on that in release notes, in case someone just ignored the bug and consumed all-lowercased parameter names.