Rewrite ISIS Adjacency discovery/polling (#13155)

* Rewrite ISIS Adjacency discovery/polling
hopefully much faster now, do most work in discovery and just check up/down in poller.

* unused variable

* Implement option for OS override

* fix an incorrect typehint

* test data

* work around stupid migration name

* update schema

* better handling for the on-demand discovery

* more detailed phpdoc

* fix when adjacency is not found

* don't clear out data when adjacency goes away

* Adjust nullable fields

* fixes

* fix class name

* correct migration

* fix bug causing adjacency data to always be blank

* port popups for port links

* isisISAdjState does not need to be nullable

* remove extra space

* default off

* If port is missing return $text

* update schema

* Cleanup old components

* correc copy paste error

database/migrations/2021_25_01_0128_isis_adjacencies_add_admin_status.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class IsisAdjacenciesAddAdminStatus extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('isis_adjacencies', function (Blueprint $table) {
+            $table->string('isisCircAdminState', 16)->default('off');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropColumns('isis_adjacencies', 'isisCircAdminState');
+    }
+}

database/migrations/2021_25_01_0129_isis_adjacencies_nullable.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class IsisAdjacenciesNullable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('isis_adjacencies', function (Blueprint $table) {
+            $table->integer('port_id')->nullable()->change();
+            $table->string('isisISAdjNeighSysType', 128)->nullable()->change();
+            $table->string('isisISAdjNeighSysID', 128)->nullable()->change();
+            $table->string('isisISAdjNeighPriority', 128)->nullable()->change();
+            $table->unsignedBigInteger('isisISAdjLastUpTime')->nullable()->change();
+            $table->string('isisISAdjAreaAddress', 128)->nullable()->change();
+            $table->string('isisISAdjIPAddrType', 128)->nullable()->change();
+            $table->string('isisISAdjIPAddrAddress', 128)->nullable()->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('isis_adjacencies', function (Blueprint $table) {
+            $table->integer('port_id')->change();
+            $table->string('isisISAdjNeighSysType', 128)->change();
+            $table->string('isisISAdjNeighSysID', 128)->change();
+            $table->string('isisISAdjNeighPriority', 128)->change();
+            $table->unsignedBigInteger('isisISAdjLastUpTime')->change();
+            $table->string('isisISAdjAreaAddress', 128)->change();
+            $table->string('isisISAdjIPAddrType', 128)->change();
+            $table->string('isisISAdjIPAddrAddress', 128)->change();
+        });
+    }
+}