Envelope2D changes for revisions 30919:30920

This commit propagates the method names change which was done in GeoAPI. There is no way such change could be done differently, since not renaming the methods cause a compilation error.

Command line:

svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r30919:30920 https://svn.osgeo.org/geotools/trunk/modules/library/referencing/src/main/java/org/geotools/geometry/Envelope2D.java
Revision 30919Revision 30920
 */
public Envelope2D(final Envelope envelope) {
    super(envelope.getMinimum(0), envelope.getMinimum(1),
          envelope.getLength (0), envelope.getLength (1));

    // TODO: check below should be first, if only Sun could fix RFE #4093999.
    final int dimension = envelope.getDimension();
 
 */
public Envelope2D(final Envelope envelope) {
    super(envelope.getMinimum(0), envelope.getMinimum(1),
          envelope.getSpan(0), envelope.getSpan(1));

    // TODO: check below should be first, if only Sun could fix RFE #4093999.
    final int dimension = envelope.getDimension();