Bug 6875 de-nesting C4::VirtualShelves

* C4::Circulation is unused, removing it
* C4::Members used only in ShelfPossibleAction, switching from use to require
* C4::Auth used only in RefreshShelvesSummary, a sub called only in
opac-addbybiblionumber.pl script, moving the require inside the sub

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>

C4/VirtualShelves.pm

@@ -26,10 +26,7 @@ use warnings;
 
 use Carp;
 use C4::Context;
-use C4::Circulation;
 use C4::Debug;
-use C4::Members;
-require C4::Auth;
 
 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK);
 
@@ -466,7 +463,8 @@ sub ShelfPossibleAction {
     my $sth = $dbh->prepare($query);
     $sth->execute($shelfnumber);
     my ( $owner, $category ) = $sth->fetchrow;
-	my $borrower = GetMemberDetails($user);
+    require C4::Members;
+	my $borrower = C4::Members::GetMemberDetails($user);
 	return 0 if not defined($user);
 	return 1 if ( $category >= 3);							# open list
     return 1 if (($category >= 2) and
@@ -559,7 +557,7 @@ This function is used in conjunction with the 'Lists' button in masthead.inc.
 =cut
 
 sub RefreshShelvesSummary ($$$) {
-	
+	require C4::Auth;
 	my ($sessionID, $loggedinuser, $row_count) = @_;
 	my $session = C4::Auth::get_session($sessionID);
 	my ($total, $totshelves, $barshelves, $pubshelves);