Expect consistent importing in SpherePoint.__repr__.

Having one symbol (SpherePoint) assumed to be imported as

    from lsst.geom import SpherePoint

while the other (degrees) is assumed to be imported via

    from lsst import geom

in order to eval() a single repr() doesn't make sense, especially
when our code never uses the latter pattern anyway.

python/lsst/geom/_SpherePoint.py

@@ -42,7 +42,7 @@ def __iter__(self):
             yield self[i]
 
     def __repr__(self):
-        argList = ["%r*geom.degrees" % (pos.asDegrees(),) for pos in self]
+        argList = ["%r*degrees" % (pos.asDegrees(),) for pos in self]
         return "SpherePoint(%s)" % (", ".join(argList))
 
     @staticmethod