Merge pull request #1445 from wizeman/u/oraclejre7

oraclejre7: Add package (as a variant of oraclejdk7)

pkgs/top-level/all-packages.nix

···
 
   oraclejre = lowPrio (pkgs.jdkdistro false false);
 
+  oraclejre7 = lowPrio (pkgs.oraclejdk7distro false false);
+
   jrePlugin = lowPrio (pkgs.jdkdistro false true);
 
   supportsJDK =