more stable checkstyle test

Author: nidi3

code-assert/src/test/java/guru/nidi/codeassert/EatYourOwnDogfoodTest.java

@@ -24,10 +24,18 @@
 import guru.nidi.codeassert.junit.PredefConfig;
 import guru.nidi.codeassert.pmd.*;
 import net.sourceforge.pmd.RulePriority;
+import org.junit.jupiter.api.BeforeAll;
+
+import java.util.Locale;
 
 import static guru.nidi.codeassert.dependency.DependencyRules.denyAll;
 
 public class EatYourOwnDogfoodTest extends CodeAssertJunit5Test {
+    @BeforeAll
+    static void init() {
+        Locale.setDefault(Locale.ENGLISH);
+    }
+
     @Override
     protected DependencyResult analyzeDependencies() {
         class GuruNidiCodeassert extends DependencyRuler {

code-assert/src/test/java/guru/nidi/codeassert/checkstyle/CheckstyleTest.java

@@ -24,6 +24,7 @@
 import guru.nidi.codeassert.snippets.DependencyTest;
 import org.hamcrest.Matcher;
 import org.hamcrest.StringDescription;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 import java.io.File;
@@ -43,9 +44,13 @@ public class CheckstyleTest {
 
     private final AnalyzerConfig config = AnalyzerConfig.maven().mainAndTest();
 
+    @BeforeAll
+    static void init() {
+        Locale.setDefault(Locale.ENGLISH);
+    }
+
     @Test
     void google() {
-        Locale.setDefault(Locale.ENGLISH);
         final CheckstyleAnalyzer analyzer = new CheckstyleAnalyzer(config, StyleChecks.google()
                 .maxLineLen(120).indentBasic(4).indentCase(4)
                 .paramName("^[a-z][a-zA-Z0-9]*$")
@@ -77,7 +82,6 @@ void google() {
 
     @Test
     void sun() {
-        Locale.setDefault(Locale.ENGLISH);
         final CheckstyleAnalyzer analyzer = new CheckstyleAnalyzer(config, StyleChecks.sun()
                 .maxLineLen(120).allowDefaultAccessMembers(true),
                 new StyleEventCollector().severity(WARNING).config(