Rename GeniUser() function to avoid conflict with GeniUser package.

Probably some perl way to avoid this, but life is short.

protogeni/lib/GeniAggregate.pm.in

@@ -1394,7 +1394,7 @@ sub Action($$$;$)
     #
     if (keys(%reloads)) {
 	if (EmulabFeatures->FeatureEnabled("NewOsload",
-					   GeniUtil::GeniUser(),
+					   GeniUtil::GetGeniUser(),
 					   undef, undef)) {
 	    require libosload_new;
 	    $osload_object = libosload_new->New();

protogeni/lib/GeniUtil.pm.in

@@ -141,7 +141,7 @@ sub FlipToElabMan()
 #
 # Lookup the geniuser.
 #
-sub GeniUser()
+sub GetGeniUser()
 {
     return User->Lookup($GENIUSER);
 }