BUG: No rendering settings

[jburel]

Possibly caused by browsing a dataset during import, black thumbnails. Once import was finished, tried opening an image. Stack trace below.

org.openmicroscopy.shoola.env.data.DSAccessException: Cannot access data. 
Cannot set RE defaults.
	at org.openmicroscopy.shoola.env.data.OMEROGateway.handleException(OMEROGateway.java:726)
	at org.openmicroscopy.shoola.env.data.OMEROGateway.needDefault(OMEROGateway.java:1616)
	at org.openmicroscopy.shoola.env.data.OMEROGateway.createRenderingEngine(OMEROGateway.java:2982)
	at org.openmicroscopy.shoola.env.data.OmeroImageServiceImpl.loadRenderingControl(OmeroImageServiceImpl.java:213)
	at org.openmicroscopy.shoola.env.data.views.calls.RenderingControlLoader$1.doCall(RenderingControlLoader.java:90)
	at org.openmicroscopy.shoola.env.data.views.BatchCall.doStep(BatchCall.java:145)
	at org.openmicroscopy.shoola.util.concur.tasks.CompositeTask.doStep(CompositeTask.java:226)
	at org.openmicroscopy.shoola.env.data.views.CompositeBatchCall.doStep(CompositeBatchCall.java:126)
	at org.openmicroscopy.shoola.util.concur.tasks.ExecCommand.exec(ExecCommand.java:165)
	at org.openmicroscopy.shoola.util.concur.tasks.ExecCommand.run(ExecCommand.java:274)
	at org.openmicroscopy.shoola.util.concur.tasks.AsyncProcessor$Runner.run(AsyncProcessor.java:91)
	at java.lang.Thread.run(Thread.java:613)
Caused by: omero.ResourceError
    serverStackTrace = "ome.conditions.ResourceError: Pixels set is missing statistics for channel '0'. This suggests an image import error or failed image import.
                        	at omeis.providers.re.metadata.StatsFactory.computeLocationStats(StatsFactory.java:233)
                        	at ome.logic.RenderingSettingsImpl.computeLocationStats(RenderingSettingsImpl.java:841)
                        	at ome.logic.RenderingSettingsImpl.resetChannelBindings(RenderingSettingsImpl.java:790)
                        	at ome.logic.RenderingSettingsImpl.resetDefaults(RenderingSettingsImpl.java:561)
                        	at ome.logic.RenderingSettingsImpl.resetDefaults(RenderingSettingsImpl.java:480)
                        	at ome.logic.RenderingSettingsImpl.resetDefaults(RenderingSettingsImpl.java:1248)
                        	at ome.services.RenderingBean$13.doWork(RenderingBean.java:1542)
                        	at sun.reflect.GeneratedMethodAccessor307.invoke(Unknown Source)

[jburel]

(In [7441]) Should avoid problem described in #2545 (Closed #2545)

[cxallan]

(In [8288]) Reverting r7441 and adding some more sanity checks to the Renderer. With r7441 it's possible that Images without channel statistics will get to the Renderer via the ThumbnailBean? and/or RenderingBean?. This can cause problems and the previous strategy of assigning min/max PixelType? range also causes the user to have to trigger a "resetDefaults()" if he/she attempted to view the Image while it was importing. We're sure that Jean-Marie made the changes for a good reason and we may need to review this again if there are further bugs that expose the issue outlined in #2545. (See #2545 and #2753; Fixes #3011)