Bug 2505: Enabled warnings in tools-home.pl, holidays.pl, exceptionHolidays.pl, and newHolidays.pl

Tested for warnings after addition of 'use warnings.' No warnings were generated.

Signed-off-by: Galen Charlton <gmcharlt@gmail.com>

tools/exceptionHolidays.pl

@@ -1,6 +1,8 @@
 #!/usr/bin/perl
 
 use strict;
+use warnings;
+
 use CGI;
 
 use C4::Auth;

tools/holidays.pl

@@ -17,6 +17,8 @@
 
 #####Sets holiday periods for each branch. Datedues will be extended if branch is closed -TG
 use strict;
+use warnings;
+
 use CGI;
 
 use C4::Auth;

tools/newHolidays.pl

@@ -1,6 +1,8 @@
 #!/usr/bin/perl
 
 use strict;
+use warnings;
+
 use CGI;
 
 use C4::Auth;

tools/tools-home.pl

@@ -16,6 +16,8 @@
 # Suite 330, Boston, MA  02111-1307 USA
 
 use strict;
+use warnings;
+
 use CGI;
 use C4::Auth;
 use C4::Output;