Crash at starting with OGRE2.1 and OpenGL

**Original report ([archived issue](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-rendering/issues/51)) by Anonymous.**

----------------------------------------
# Description
After installing ignition-blueprint with apt, Ign gazebo crash with the shapes.sdf sample.
It's not able to load properly OGRE2.1 . I've already try to compile OGRE but nothing changed. I'm running gazebo with Ubuntu-18 LTS and I only have a Graphic Intel chipset.

You can see bellow the error message :
```
#!bash

[GUI] [Err] [Ogre2RenderEngine.cc:450] Unable to load Ogre Plugin[/usr/lib/x86_64-linux-gnu/OGRE-2.1/OGRE/RenderSystem_GL3Plus]. Rendering will not be possible.Make sure you have installed OGRE properly.
[GUI] [Err] [Ogre2RenderEngine.cc:484] unable to find OpenGL rendering system. OGRE is probably installed incorrectly. Double check the OGRE cmake output, and make sure OpenGL is enabled.
/usr/lib/ruby/ignition/cmdgazebo2.rb:302: [BUG] Segmentation fault at 0x0000000000000000
```
I didn't find any fix for my issue that's why i'm writing here.
Thank

# Steps to Reproduce

1. Follow this tutorial : https://ignitionrobotics.org/docs/blueprint
2. run `ign gazebo shapes.sdf`

**Expected behavior:**

Gazebo start normally.

**Actual behavior:**

Get this error message :
```
#!bash

[GUI] [Err] [Ogre2RenderEngine.cc:450] Unable to load Ogre Plugin[/usr/lib/x86_64-linux-gnu/OGRE-2.1/OGRE/RenderSystem_GL3Plus]. Rendering will not be possible.Make sure you have installed OGRE properly.
[GUI] [Err] [Ogre2RenderEngine.cc:484] unable to find OpenGL rendering system. OGRE is probably installed incorrectly. Double check the OGRE cmake output, and make sure OpenGL is enabled.
/usr/lib/ruby/ignition/cmdgazebo2.rb:302: [BUG] Segmentation fault at 0x0000000000000000
```

Reproduce with `ign gazebo shapes.sdf` on Ubuntu 18 LTS and the Intel graphics setup described. Start by examining the errors at Ogre2RenderEngine.cc:450 and :484, then trace the crash reported at /usr/lib/ruby/ignition/cmdgazebo2.rb:302. Done means the sample starts without the Ogre plugin failure or segmentation fault.

Written by the indexing model from the issue text.