Exception when promoting a variable with src_indices at two different hierarchy levels.

[Kenneth-T-Moore]

Summary of Issue

Exception when promoting a variable with src_indices at two different hierarchy levels.

Issue Type

• [x ] Bug
• Enhancement
  POEM #___ <N/A or POEM number at https://github.com/OpenMDAO/POEMs>

Description

See example. This may require discussion, as I am not sure what behavior it should have when you specify src_indices and flat_src_indices at 2 hiearchy levels. My gut feeling is that the outermost ones should replace the inner ones.

If the decision is to raise an exception instead, then add an error that the user can understand.

Example

https://gist.github.com/Kenneth-T-Moore/ad74a6179c8dc6e6363581388e42b1c5

Environment

<For bugs, otherwise N/A>

Operating System: <i.e. OS X 10.14.6, Windows 10, Ubuntu 16.04>

Python environment: <i.e. Anaconda Python 3.7.1>

Packages: <versions of Dymos, OpenMDAO, and other pertinent Python packages. You can just paste the output of pip freeze or conda list here.>