TT#146800 support decimal VAT rates

Change-Id: I7222e012fbc6c848527f0f7a2a45c56894ae509b

lib/NGCP/Panel/Controller/Subscriber.pm

@@ -2751,7 +2751,7 @@ sub calllist_master :Chained('base') :PathPart('calls') :CaptureArgs(0) :Allowed
     ) if($c->user->roles eq "admin" || $c->user->roles eq "reseller");
 
     my $vat_factor = $c->config->{appearance}{cdr_apply_vat} && $c->stash->{subscriber}->contract->add_vat
-        ? "* " . (1 + $c->stash->{subscriber}->contract->vat_rate / 100)
+        ? "* " . (1 + $c->stash->{subscriber}->contract->vat_rate / 100.0)
         : "";
     $c->log->debug("using vat_factor '$vat_factor'");
 

lib/NGCP/Panel/Form/Contract/Base.pm

@@ -158,11 +158,13 @@ has_field 'invoice_template' => (
 );
 
 has_field 'vat_rate' => (
-    type => 'Integer',
+    type => 'Float',
+    size => 15,
+    precision => 14,
     label => 'VAT Rate',
-    range_start => 0,
-    range_end => 100,
-    default => 0,
+    range_start => 0.0,
+    range_end => 100.0,
+    default => 0.0,
     element_attr => {
         rel => ['tooltip'],
         title => ['The VAT rate in percentage (e.g. 20).']

lib/NGCP/Panel/Form/Contract/CustomerAPI.pm

@@ -91,10 +91,12 @@ has_field 'invoice_template_id' => (
 );
 
 has_field 'vat_rate' => (
-    type => 'Integer',
-    range_start => 0,
-    range_end => 100,
-    default => 0,
+    type => 'Float',
+    size => 15,
+    precision => 14,
+    range_start => 0.0,
+    range_end => 100.0,
+    default => 0.0,
     element_attr => {
         rel => ['tooltip'],
         title => ['The VAT rate in percentage (e.g. 20).']

lib/NGCP/Panel/Utils/Invoice.pm

@@ -17,15 +17,15 @@ sub get_invoice_amounts{
     my $invoice = {};
     $contract_balance->{cash_balance_interval} //= 0;
     $billing_profile->{interval_charge} //= 0;
-    $customer_contract->{vat_rate} //= 0;
+    $customer_contract->{vat_rate} //= 0.0;
     #use Data::Dumper;
     #print Dumper [$contract_balance,$billing_profile];
     $invoice->{amount_net} = $contract_balance->{cash_balance_interval} / 100 + $billing_profile->{interval_charge};
     $invoice->{amount_vat} =
         $customer_contract->{add_vat}
         ?
-            $invoice->{amount_net} * ($customer_contract->{vat_rate}/100)
-            : 0;
+            $invoice->{amount_net} * ($customer_contract->{vat_rate} / 100.0)
+            : 0.0;
     $invoice->{amount_total} =  $invoice->{amount_net} + $invoice->{amount_vat};
     return $invoice;
 }

lib/NGCP/Panel/Utils/InvoiceTemplate.pm

@@ -234,7 +234,7 @@ sub get_dummy_data {
         customer => {
             id => int(rand(10000))+10000,
             external_id => 'Resext1234567890',
-            vat_rate => 20,
+            vat_rate => 20.0,
             add_vat => 0,
         },
         custcontact => {