[#1500] Fix allocation limit being required even though it isn't used.

app/Models/Server.php

@@ -63,7 +63,7 @@ class Server extends Model implements CleansAttributes, ValidableContract
         'image' => 'required',
         'startup' => 'required',
         'database_limit' => 'present',
-        'allocation_limit' => 'present',
+        'allocation_limit' => 'sometimes',
     ];
 
     /**

database/migrations/2019_03_02_142328_set_allocation_limit_default_null.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class SetAllocationLimitDefaultNull extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('servers', function (Blueprint $table) {
+            $table->unsignedInteger('allocation_limit')->nullable()->default(null)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('servers', function (Blueprint $table) {
+            $table->unsignedInteger('allocation_limit')->nullable()->default(0)->change();
+        });
+    }
+}