Change rank field from image_link to image_url for consistency

app/Console/Services/Importer.php

@@ -348,7 +348,7 @@ class Importer
         {
             $rank = Rank::firstOrCreate(
                 ['name' => $row->rank],
-                ['image_link' => $row->rankimage, 'hours'=>$row->minhours]
+                ['image_url' => $row->rankimage, 'hours'=>$row->minhours]
             );
 
             $this->addMapping('ranks', $row->rankid, $rank->id);

app/Database/migrations/2017_06_21_165410_create_ranks_table.php

@@ -16,7 +16,7 @@ class CreateRanksTable extends Migration
         Schema::create('ranks', function (Blueprint $table) {
             $table->increments('id');
             $table->string('name', 50);
-            $table->string('image_link')->nullable();
+            $table->string('image_url')->nullable();
             $table->unsignedInteger('hours')->default(0);
             $table->unsignedDecimal('acars_base_pay_rate')->nullable()->default(0);
             $table->unsignedDecimal('manual_base_pay_rate')->nullable()->default(0);

app/Models/Rank.php

@@ -16,7 +16,7 @@ class Rank extends BaseModel
     public $fillable = [
         'name',
         'hours',
-        'image_link',
+        'image_url',
         'acars_base_pay_rate',
         'manual_base_pay_rate',
         'auto_approve_acars',