DirectionAlongMeridian changes for revisions 26668:26669

This commit get the code to compile after a change in GeoAPI classes. Reverting this commit causes a compilation error (since the AxisDirection constructor is not public anymore), which can only be fixed by replacing the constructor call by a call to valueOf, which lead us the the same result than this commit. There is no other way.

Command line:

svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r26668:26669 https://svn.osgeo.org/geotools/trunk/modules/library/referencing/src/main/java/org/geotools/referencing/cs/DirectionAlongMeridian.java

     */
    direction = findDirection(name);
    if (direction == null) {
        direction = new AxisDirection(name);
    }
}
return direction;

     */
    direction = findDirection(name);
    if (direction == null) {
        direction = AxisDirection.valueOf(name);
    }
}
return direction;