Revert global using change; fix TestRAMDirectory concurrency issue

Author: paulirwin

src/GlobalTestUsings.cs

@@ -1,6 +1,3 @@
-// alias Assert to Lucene.Net.TestFramework.Assert by default
-global using Assert = Lucene.Net.TestFramework.Assert;
-
 // add NUnit 3 compat shim with NUnit prefix
 global using NUnitAssert = NUnit.Framework.Legacy.ClassicAssert;
 

src/Lucene.Net.TestFramework/Analysis/BaseTokenStreamTestCase.cs

@@ -14,6 +14,7 @@
 using System.IO;
 using System.Text;
 using System.Threading;
+using Assert = Lucene.Net.TestFramework.Assert;
 using Attribute = Lucene.Net.Util.Attribute;
 using Directory = Lucene.Net.Store.Directory;
 using JCG = J2N.Collections.Generic;

src/Lucene.Net.TestFramework/Analysis/CollationTestBase.cs

@@ -9,6 +9,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Text;
+using Assert = Lucene.Net.TestFramework.Assert;
 using Directory = Lucene.Net.Store.Directory;
 
 namespace Lucene.Net.Analysis

src/Lucene.Net.TestFramework/Analysis/MockTokenizer.cs

@@ -7,6 +7,7 @@
 using System;
 using System.Globalization;
 using System.IO;
+using Assert = Lucene.Net.TestFramework.Assert;
 using CharacterRunAutomaton = Lucene.Net.Util.Automaton.CharacterRunAutomaton;
 using RegExp = Lucene.Net.Util.Automaton.RegExp;
 

src/Lucene.Net.TestFramework/Analysis/VocabularyAssert.cs

@@ -3,6 +3,7 @@
 using System.IO;
 using System.IO.Compression;
 using System.Text;
+using Assert = Lucene.Net.TestFramework.Assert;
 
 namespace Lucene.Net.Analysis
 {

src/Lucene.Net.TestFramework/Index/BaseCompressingDocValuesFormatTestCase.cs

@@ -7,6 +7,7 @@
 using System.Collections.Generic;
 using RandomizedTesting.Generators;
 using JCG = J2N.Collections.Generic;
+using Assert = Lucene.Net.TestFramework.Assert;
 using Test = NUnit.Framework.TestAttribute;
 
 namespace Lucene.Net.Index

src/Lucene.Net.TestFramework/Index/BaseDocValuesFormatTestCase.cs

@@ -16,6 +16,7 @@
 using System.Globalization;
 using System.Threading;
 using static Lucene.Net.Index.TermsEnum;
+using Assert = Lucene.Net.TestFramework.Assert;
 using JCG = J2N.Collections.Generic;
 using Test = NUnit.Framework.TestAttribute;
 

src/Lucene.Net.TestFramework/Index/BasePostingsFormatTestCase.cs

@@ -12,6 +12,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using Assert = Lucene.Net.TestFramework.Assert;
 using Directory = Lucene.Net.Store.Directory;
 using JCG = J2N.Collections.Generic;
 using Test = NUnit.Framework.TestAttribute;

src/Lucene.Net.TestFramework/Index/BaseStoredFieldsFormatTestCase.cs

@@ -21,6 +21,7 @@
 using System.Runtime.ExceptionServices;
 using System.Text;
 using JCG = J2N.Collections.Generic;
+using Assert = Lucene.Net.TestFramework.Assert;
 using RandomInts = RandomizedTesting.Generators.RandomNumbers;
 using Number = J2N.Numerics.Number;
 using Double = J2N.Numerics.Double;

src/Lucene.Net.TestFramework/Index/BaseTermVectorsFormatTestCase.cs

@@ -15,6 +15,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using static Lucene.Net.Index.TermsEnum;
+using Assert = Lucene.Net.TestFramework.Assert;
 using Attribute = Lucene.Net.Util.Attribute;
 using JCG = J2N.Collections.Generic;
 using Test = NUnit.Framework.TestAttribute;