TT#126853 Replace "free minutes" with "free calling time"

The value of "interval_free_time" preference is specified in seconds.
To avoid confusion, use the term "free calling time" rather than "free
minutes" in tooltips.

Change-Id: Ia4bd507e4a2281723fd2168a34b2178bf404f867

lib/NGCP/Panel/Form/BillingFee.pm

@@ -159,7 +159,7 @@ has_field 'onpeak_use_free_time' => (
     type => 'Boolean',
     element_attr => {
         rel => ['tooltip'],
-        title => ['Whether free minutes may be used when calling this destination during onpeak hours.']
+        title => ['Free calling time may be used when calling this destination during on-peak hours.']
     },
     default => 0,
 );
@@ -168,7 +168,7 @@ has_field 'offpeak_use_free_time' => (
     type => 'Boolean',
     element_attr => {
         rel => ['tooltip'],
-        title => ['Whether free minutes may be used when calling this destination during offpeak hours.']
+        title => ['Free calling time may be used when calling this destination during off-peak hours.']
     },
     default => 0,
 );

lib/NGCP/Panel/Form/BillingProfile/Reseller.pm

@@ -80,7 +80,7 @@ has_field 'interval_free_time' => (
     type => 'Integer',
     element_attr => {
         rel => ['tooltip'],
-        title => ['The included free minutes per billing interval (in seconds, e.g. 60000 for 1000 free minutes).']
+        title => ['The included free calling time per billing interval (in seconds, e.g. 60000 for 1000 free minutes).']
     },
     default => '0',
 );