Popover displays tooltip on itself and every child

[ValentinH]

This is a duplicate of #5598 which was poorly described.

Bug description:

When using the popover-title option, a title attribute is added to the popover element which results in a native browser tooltip being displayed on all the popup when the user stops moving his mouse.
By default, this is pretty weird and it gets even worse when a uib-tooltip is used inside the popup:

Link to minimally-working plunker that reproduces the issue:

http://plnkr.co/edit/DGz3BZ4zQwagCFbXGw4T?p=preview

Version of Angular, UIBS, and Bootstrap

Angular: 1.5.0

UIBS: 1.2.5

Bootstrap: 3.3.6

[RobJacobs]

@ValentinH Thanks for reporting this with all the relevant info, it makes it so much easier to diagnose issues. Here is a plunk with a proposed change, I will be creating a PR shortly.