SONAR-21052 Drop specific key validation for custom rules from rule templates

server/sonar-webserver-common/src/it/java/org/sonar/server/common/rule/RuleCreatorIT.java

     }
   }
 
-  @Test
-  public void fail_to_create_custom_rule_when_invalid_key() {
-    // insert template rule
-    RuleDto templateRule = createTemplateRule();
-
-    NewCustomRule newRule = NewCustomRule.createForCustomRule(RuleKey.of("java", "*INVALID*"), templateRule.getKey())
-      .setName("My custom")
-      .setMarkdownDescription("some description")
-      .setSeverity(Severity.MAJOR)
-      .setStatus(RuleStatus.READY)
-      .setParameters(Map.of("regex", "a.*"));
-
-    assertThatThrownBy(() -> underTest.create(dbSession, newRule))
-      .isInstanceOf(BadRequestException.class)
-      .hasMessage("The rule key \"*INVALID*\" is invalid, it should only contain: a-z, 0-9, \"_\"");
-  }
-
   @Test
   public void fail_to_create_custom_rule_when_rule_key_already_exists() {
     // insert template rule

server/sonar-webserver-common/src/main/java/org/sonar/server/common/rule/RuleCreator.java

 import java.util.Optional;
 import java.util.Set;
 import java.util.function.Function;
-import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import javax.annotation.Nullable;
 import org.apache.commons.lang3.StringUtils;
 @ServerSide
 public class RuleCreator {
   private static final String TEMPLATE_KEY_NOT_EXIST_FORMAT = "The template key doesn't exist: %s";
-  private static final Pattern RULE_KEY_REGEX = Pattern.compile("^[\\w]+$");
-
   private final System2 system2;
   private final RuleIndexer ruleIndexer;
   private final DbClient dbClient;
     if (!ruleKey.repository().equals(templateKey.repository())) {
       errors.add("Custom and template keys must be in the same repository");
     }
-    if (!RULE_KEY_REGEX.matcher(ruleKey.rule()).matches()) {
-      errors.add(format("The rule key \"%s\" is invalid, it should only contain: a-z, 0-9, \"_\"", ruleKey.rule()));
-    }
   }
 
   private Optional<RuleDto> loadRule(DbSession dbSession, RuleKey ruleKey) {
         SoftwareQuality softwareQuality = ImpactMapper.convertToSoftwareQuality(RuleType.valueOf(type));
         org.sonar.api.issue.impact.Severity impactSeverity = ImpactMapper.convertToImpactSeverity(severity);
         ruleDto.addDefaultImpact(new ImpactDto()
-            .setSoftwareQuality(softwareQuality)
-            .setSeverity(impactSeverity))
+          .setSoftwareQuality(softwareQuality)
+          .setSeverity(impactSeverity))
           .setType(type)
           .setSeverity(severity);
       }