Node samples broken in latest versions of Bot Builder

[tomhon]

The startNewDialog and startNewDialogWithPrompt samples both break when used with version 3.5.0 and higher of botbuilder.
Version 3.4.4 of botbuilder appears to be the most recent version that works with both these samples.

[ejadib]

Take a look at https://github.com/Microsoft/BotBuilder-Samples/tree/master/Node/core-proactiveMessages /cc: @EricDahlvang

[mrameshk]

Take a look at https://github.com/Microsoft/BotBuilder-Samples/tree/master/Node/core-proactiveMessages /cc: @EricDahlvang

This is broken too