fixed struct alignment && refactor linter (#369)

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Reviewed-on: #369
Co-authored-by: Evstigneev Denis <danteevstigneev@yandex.ru>
Co-committed-by: Evstigneev Denis <danteevstigneev@yandex.ru>

util/structfs/metadata_ec2.go

@@ -2,29 +2,29 @@ package structfs
 
 type EC2Metadata struct {
 	Latest struct {
+		Userdata string `json:"user-data"`
 		Metadata struct {
-			AMIID              int      `json:"ami-id"`
-			AMILaunchIndex     int      `json:"ami-launch-index"`
-			AMIManifestPath    string   `json:"ami-manifest-path"`
-			AncestorAMIIDs     []int    `json:"ancestor-ami-ids"`
-			BlockDeviceMapping []string `json:"block-device-mapping"`
-			InstanceID         int      `json:"instance-id"`
-			InstanceType       string   `json:"instance-type"`
-			LocalHostname      string   `json:"local-hostname"`
-			LocalIPv4          string   `json:"local-ipv4"`
-			KernelID           int      `json:"kernel-id"`
-			Placement          string   `json:"placement"`
-			AvailabilityZone   string   `json:"availability-zone"`
-			ProductCodes       string   `json:"product-codes"`
-			PublicHostname     string   `json:"public-hostname"`
-			PublicIPv4         string   `json:"public-ipv4"`
-			PublicKeys         []struct {
+			AMIManifestPath  string `json:"ami-manifest-path"`
+			InstanceType     string `json:"instance-type"`
+			LocalHostname    string `json:"local-hostname"`
+			LocalIPv4        string `json:"local-ipv4"`
+			Placement        string `json:"placement"`
+			AvailabilityZone string `json:"availability-zone"`
+			ProductCodes     string `json:"product-codes"`
+			PublicHostname   string `json:"public-hostname"`
+			PublicIPv4       string `json:"public-ipv4"`
+			PublicKeys       []struct {
 				Key []string `json:"-"`
 			} `json:"public-keys"`
-			RamdiskID      int      `json:"ramdisk-id"`
-			ReservationID  int      `json:"reservation-id"`
-			SecurityGroups []string `json:"security-groups"`
+			AncestorAMIIDs     []int    `json:"ancestor-ami-ids"`
+			BlockDeviceMapping []string `json:"block-device-mapping"`
+			SecurityGroups     []string `json:"security-groups"`
+			RamdiskID          int      `json:"ramdisk-id"`
+			ReservationID      int      `json:"reservation-id"`
+			AMIID              int      `json:"ami-id"`
+			AMILaunchIndex     int      `json:"ami-launch-index"`
+			KernelID           int      `json:"kernel-id"`
+			InstanceID         int      `json:"instance-id"`
 		} `json:"meta-data"`
-		Userdata string `json:"user-data"`
 	} `json:"latest"`
 }