Added missing license headers

Lucene.Net.sln

@@ -1,5 +1,21 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 VisualStudioVersion = 16.0.29806.167
 MinimumVisualStudioVersion = 15.0.26730.8
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "azure-templates", "azure-templates", "{05CE3A39-40D4-452D-AFE0-E57E536A08C6}"

NuGet.config

@@ -1,6 +1,26 @@
 <?xml version="1.0" encoding="utf-8"?>
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
 <configuration>
   <packageSources>
     <add key="NuGet official package source" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
-</configuration>
+</configuration>

src/Lucene.Net.TestFramework/Support/Util/LuceneTestFrameworkInitializer.cs

@@ -1,11 +1,28 @@
-using Lucene.Net.Codecs;
+using Lucene.Net.Codecs;
 using Lucene.Net.Configuration;
 using NUnit.Framework;
 using System;
 using System.Threading;
 
 namespace Lucene.Net.Util
 {
+    /*
+     * Licensed to the Apache Software Foundation (ASF) under one or more
+     * contributor license agreements.  See the NOTICE file distributed with
+     * this work for additional information regarding copyright ownership.
+     * The ASF licenses this file to You under the Apache License, Version 2.0
+     * (the "License"); you may not use this file except in compliance with
+     * the License.  You may obtain a copy of the License at
+     *
+     *     http://www.apache.org/licenses/LICENSE-2.0
+     *
+     * Unless required by applicable law or agreed to in writing, software
+     * distributed under the License is distributed on an "AS IS" BASIS,
+     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     * See the License for the specific language governing permissions and
+     * limitations under the License.
+     */
+
     /// <summary>
     /// <see cref="LuceneTestFrameworkInitializer"/> may be subclassed by end users in order to
     /// use standard dependency injection techniques for classes under test. A subclass of <see cref="LuceneTestFrameworkInitializer"/>
@@ -194,4 +211,4 @@ internal virtual void IncrementInitalizationCount()
         {
         }
     }
-}
+}