wip(downloads): fixed some ISO URLs

lib/Ravada.pm

@@ -119,6 +119,9 @@ sub BUILD {
     }
     Ravada::Auth::init($CONFIG);
 
+}
+
+sub _install($self) {
     $self->_create_tables();
     $self->_upgrade_tables();
     $self->_update_data();
@@ -248,34 +251,24 @@ sub _update_isos {
             ,min_disk_size => '10'
 
         }
-        ,fedora => {
-            name => 'Fedora 25'
-            ,description => 'RedHat Fedora 25 Workstation 64 bits'
-            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/25/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-25-.*\.iso'
-            ,arch => 'amd64'
-            ,xml => 'xenial64-amd64.xml'
-            ,xml_volume => 'xenial64-volume.xml'
-            ,sha256_url => '$url/Fedora-Workstation-25-.*-x86_64-CHECKSUM'
-            ,min_disk_size => '10'
-        }
-        ,fedora_26 => {
-            name => 'Fedora 26'
-            ,description => 'RedHat Fedora 26 Workstation 64 bits'
-            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/26/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-26-.*\.iso'
+        ,fedora_27 => {
+            name => 'Fedora 27'
+            ,description => 'RedHat Fedora 27 Workstation 64 bits'
+            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/27/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-27-.*\.iso'
             ,arch => 'amd64'
             ,xml => 'xenial64-amd64.xml'
             ,xml_volume => 'xenial64-volume.xml'
-            ,sha256_url => 'http://fedora.mirrors.ovh.net/linux/releases/26/Workstation/x86_64/iso/Fedora-Workstation-26-.*-x86_64-CHECKSUM'
+            ,sha256_url => '$url/Fedora-Workstation-27-.*-x86_64-CHECKSUM'
             ,min_disk_size => '10'
         }
-        ,fedora_27 => {
-            name => 'Fedora 27'
-            ,description => 'RedHat Fedora 27 Workstation 64 bits'
-            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/27/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-27-.*\.iso'
+        ,fedora_28 => {
+            name => 'Fedora 28'
+            ,description => 'RedHat Fedora 28 Workstation 64 bits'
+            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/28/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-28-.*\.iso'
             ,arch => 'amd64'
             ,xml => 'xenial64-amd64.xml'
             ,xml_volume => 'xenial64-volume.xml'
-            ,sha256_url => 'http://fedora.mirrors.ovh.net/linux/releases/27/Workstation/x86_64/iso/Fedora-Workstation-27-.*-x86_64-CHECKSUM'
+            ,sha256_url => 'http://fedora.mirrors.ovh.net/linux/releases/28/Workstation/x86_64/iso/Fedora-Workstation-28-.*-x86_64-CHECKSUM'
             ,min_disk_size => '10'
         }
         ,kubuntu_64 => {