TT#69200 Use strict and warnings

We require these with perlcritic, but have not been triggered as these
scripts have no shebang, which we will be adding later.

Change-Id: I81ac98c9ee72cce9b3446a98e1aae53e4c04b578
(cherry picked from commit 803bacf8a5)

Build.PL

@@ -1,3 +1,6 @@
+use strict;
+use warnings;
+
 use Module::Build qw();
 my $builder = Module::Build->new(
     dist_name       => 'NGCP::BulkProcessor',

lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t

@@ -1,3 +1,6 @@
+use strict;
+use warnings;
+
 use Net::Domain qw(hostfqdn);
 use JSON -support_by_pp, -no_export;
 use Test::More;