Trivial formatting: replace "// Related to JDK7" or "JDK8" or "GeoAPI" comment by a single
"// Branch-dependent imports" line, in order to have a single label and to be more explicit
about the purpose of keeping those imports together.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1599168 13f79535-47bb-0310-9956-ffa450edef68