Add tooltips to basic filter step

[seanforyou23]

Tooltips were included in the initial designs, but implementation is missing.

https://github.com/syndesisio/syndesis-ux/blob/master/designs/filter-step/filter-step.pdf

[amysueg]

Somewhere I remember that @TovaCohen has a list of the actual wording of the tooltips for the application. Did I remember that correctly? And if so, then @TovaCohen would you please attach that document to this ticket?

[TovaCohen]

The document where we planned the content for the guided tour popups had a few tooltips.
For the basic filter step, I suggest these three tooltips, one for each of the three fields:

The data you want to evaluate
Must meet this condition
For this value

I'm happy to provide the text for tooltips. What's the best way for me to do that?
I know that a maven plugin was created to pull text from doc source files, but it has not yet been implemented. I think I need to insert some kind of tags in doc source files for the correct text to be pulled into the correct location. @rhuss Is someone available to work on this with me?