Update to Laravel 5.7 (PHP 7.3 support) (#9800)

* Move assets to 5.7 location

* Add 5.7 SVGs

* add cache data dir

* update QUEUE_DRIVER -> QUEUE_CONNECTION

* Update trusted proxy config

* update composer.json

* 5.5 command loading

* @php and @endphp can't be inline

* Laravel 5.6 logging, Nice!

* Update blade directives

* improved redirects

* remove unneeded service providers

* Improved debugbar loading

* no need to emulate renderable exceptions anymore

* merge updated 5.7 files (WIP)

* Enable CSRF

* database_path() call causes issue in init.php

* fix old testcase name

* generic phpunit 7 fixes

* add missed file_get_contents
Keep migrations table content

* fix duplicate key

* Drop old php versions from travis-ci

* remove hhvm

* fix code climate message

* remove use of deprecated function assertInternalType

* Disable CSRF, we'll enable it separately.
All forms need to be updated to work.

* Update document references

LibreNMS/Util/ModuleTestHelper.php

@@ -95,7 +95,7 @@ class ModuleTestHelper
 
         if (is_null(self::$module_tables)) {
             // only load the yaml once, then keep it in memory
-            self::$module_tables = Yaml::parse($install_dir . '/tests/module_tables.yaml');
+            self::$module_tables = Yaml::parse(file_get_contents($install_dir . '/tests/module_tables.yaml'));
         }
     }