Fix flaky SpEL tests

This commit fixes SpEL related tests that failed if the test methods
were executed in a different order than in the Gradle build.

(cherry picked from commit 97e10a5948)

spring-expression/src/test/java/org/springframework/expression/spel/ConstructorInvocationTests.java

@@ -19,6 +19,7 @@ package org.springframework.expression.spel;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.expression.ConstructorResolver;
@@ -41,6 +42,11 @@ import static org.assertj.core.api.Assertions.assertThatException;
  */
 class ConstructorInvocationTests extends AbstractExpressionTests {
 
+	@BeforeEach
+	void resetCounter() {
+		Tester.counter = 0;
+	}
+
 	@Test
 	void constructorWithArgument() {
 		evaluate("new String('hello world')", "hello world", String.class);

spring-expression/src/test/java/org/springframework/expression/spel/SpelCompilationCoverageTests.java

@@ -2966,6 +2966,7 @@ public class SpelCompilationCoverageTests extends AbstractExpressionTests {
 		assertThat((Boolean) expression.getValue(tvar)).isFalse();
 
 		TestClass7 tc7 = new TestClass7();
+		TestClass7.reset();
 		expression = parse("property == 'UK'");
 		assertThat((Boolean) expression.getValue(tc7)).isTrue();
 		TestClass7.property = null;

spring-expression/src/test/java/org/springframework/expression/spel/SpelReproTests.java

@@ -37,6 +37,7 @@ import java.util.Properties;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import org.assertj.core.api.InstanceOfAssertFactories;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.core.MethodParameter;
@@ -85,6 +86,12 @@ class SpelReproTests extends AbstractExpressionTests {
 	private static final ParserContext DOLLARSQUARE_TEMPLATE_PARSER_CONTEXT = new TemplateParserContext("$[", "]");
 
 
+	@BeforeEach
+	void resetGoo() {
+		Goo.reset();
+	}
+
+
 	@Test
 	void NPE_SPR5661() {
 		evaluate("joinThreeStrings('a',null,'c')", "anullc", String.class);
@@ -1880,7 +1887,11 @@ class SpelReproTests extends AbstractExpressionTests {
 
 	static class Goo {
 
-		public static Goo instance = new Goo();
+		public static Goo instance;
+
+		static void reset() {
+			instance = new Goo();
+		}
 
 		public String bar = "key";