MT#17247 float field precision given, but no size

+precision adjusted from 18 to 14, since 15 is the
max number of digits of double (53 bits)

Change-Id: Ia47448354ce943d57294be7098ec6c7e4af1935e

lib/NGCP/Panel/Form/BillingFee.pm

@@ -57,7 +57,8 @@ has_field 'billing_zone' => (
 
 has_field 'onpeak_init_rate' => (
     type => 'Float',
-    precision => 18,
+    size => 15,
+    precision => 14,
     element_attr => {
         rel => ['tooltip'],
         title => ['The cost of the first interval in cents per second (e.g. 0.90).']
@@ -78,7 +79,8 @@ has_field 'onpeak_init_interval' => (
 
 has_field 'onpeak_follow_rate' => (
     type => 'Float',
-    precision => 18,
+    size => 15,
+    precision => 14,
     element_attr => {
         rel => ['tooltip'],
         title => ['The cost of each following interval in cents per second (e.g. 0.90).']
@@ -99,7 +101,8 @@ has_field 'onpeak_follow_interval' => (
 
 has_field 'offpeak_init_rate' => (
     type => 'Float',
-    precision => 18,
+    size => 15,
+    precision => 14,
     element_attr => {
         rel => ['tooltip'],
         title => ['The cost of the first interval in cents per second (e.g. 0.90).']
@@ -120,7 +123,8 @@ has_field 'offpeak_init_interval' => (
 
 has_field 'offpeak_follow_rate' => (
     type => 'Float',
-    precision => 18,
+    size => 15,
+    precision => 14,
     element_attr => {
         rel => ['tooltip'],
         title => ['The cost of each following interval in cents per second (e.g. 0.90).']