DefaultEngineeringCRS changes for revisions 7847:7848

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Command line:

svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r7847:7848 https://svn.osgeo.org/geotools/trunk/modules/library/referencing/src/main/java/org/geotools/referencing/crs/DefaultEngineeringCRS.java

import java.util.Map;
import java.util.Locale;
import java.util.Collections;
import javax.units.Unit;
import javax.units.SI;

// OpenGIS direct dependencies

import java.util.Map;
import java.util.Locale;
import java.util.Collections;
//import javax.units.Unit;
import javax.units.SI;

// OpenGIS direct dependencies