CoverageInfo.getCoverage(envelope,dim) always uses the same CRS as sourceCRS 
and destCRS instead of using the original coverage CRS as destCRS
----------------------------------------------------------------------------------------------------------------------------------------------

                 Key: GEOS-2243
                 URL: http://jira.codehaus.org/browse/GEOS-2243
             Project: GeoServer
          Issue Type: Bug
    Affects Versions: 1.7.0-RC3
            Reporter: Daniele Romagnoli
            Assignee: Andrea Aime
             Fix For: 1.7.0 


In "main" module, CoverageInfo.getCoverage method contains the following lines 
of code:

....
final CoordinateReferenceSystem sourceCRS = 
envelope.getCoordinateReferenceSystem();
final CoordinateReferenceSystem destCRS = 
envelope.getCoordinateReferenceSystem();
....

This result in useless future checks on CRS equality, when looking for a 
MathTransform between requested envelope's CRS and CoverageInfo's envelope's 
CRS.

The solution is to change the second line of code with:
final CoordinateReferenceSystem destCRS = 
coverageEnvelope.getCoordinateReferenceSystem();

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