MT#64346 skip email dispatch without a dest email

* when during email template sending invokation there is
  no target email, the process is correctly skipped.

Change-Id: I810b258c9e623b75598fb5da9b98ff499a419c44
(cherry picked from commit 00b960814d)

lib/NGCP/Panel/Utils/Email.pm

@@ -80,6 +80,8 @@ sub new_subscriber {
     my $email = $subscriber->contact ? 
         $subscriber->contact->email : $subscriber->contract->contact->email;
 
+    return unless $template->from_email && $email;
+
     my $vars = {
         url => $url,
         subscriber => $subscriber->username . '@' . $subscriber->domain->domain,
@@ -109,6 +111,8 @@ sub password_reset {
     my $email = $subscriber->contact ? 
         $subscriber->contact->email : $subscriber->contract->contact->email;
 
+    return unless $template->from_email && $email;
+
     my $vars = {
         url => $url,
         subscriber => $subscriber->username . '@' . $subscriber->domain->domain,
@@ -127,6 +131,8 @@ sub admin_password_reset {
     return unless($template);
     my $email = $admin->email;
 
+    return unless $template->from_email && $email;
+
     my $vars = {
         url => $url,
         admin => $admin->login,