Add built in delay in tooltips

[mmenestr]

Currently, tooltips do not have a delay on hover, by default. If an element has a tooltip associated to it, the tooltip shows up immediately, with no delay which in many use cases is not a desired interaction. For example. if multiple rows in a table, or multiple cards in a card view have tooltips on hover, the user would run into a situation where they would be overwhelmed with tooltips as they scroll through the page.

I brought this issue up at PatternFly design share and everyone agreed that we should probably add a second of delay to tooltips by default. The only exception would be if the tooltip is associated to an icon.

@mcarrano @redallen