MT#62763 Use perl strictures

Warned-by: perlcritic
Fixes: TestingAndDebugging::RequireUseStrict TestingAndDebugging::RequireUseWarnings
Change-Id: I41f46e419ee375dfcdbe20770710bc3f5520fecc

sandbox/cftimeset_time_tz_conversion.t

@@ -1,4 +1,5 @@
 use strict;
+use warnings;
 
 use Test::More;
 

sandbox/convert_cftimeset_time_tz.pl

@@ -1,4 +1,5 @@
 use strict;
+use warnings;
 
 use DateTime qw();
 use DateTime::TimeZone qw();

sandbox/generate_logfile_data_inventory.pl

@@ -1,4 +1,5 @@
 use strict;
+use warnings;
 
 eval 'use lib "/home/rkrenn/sipwise/git/sipwise-base/lib";';
 eval 'use lib "/home/rkrenn/sipwise/git/ngcp-panel/lib";';

sandbox/test_js.pl

@@ -1,5 +1,5 @@
-
 use strict;
+use warnings;
 use JE qw();
 use Test::More;
 

t/api-rest/api-events.t

@@ -1,3 +1,6 @@
+use strict;
+use warnings;
+
 #use Sipwise::Base;
 use Net::Domain qw(hostfqdn);
 use JSON qw();