Make selector match package-private

Author: mtoffl01

internal-api/src/main/java/datadog/trace/bootstrap/config/provider/StableConfigParser.java

@@ -125,11 +125,9 @@ private static boolean checkEnvMatches(
     return false;
   }
 
-  // TODO: Make this private again after testing?
   // We do all of the case insensitivity modifications in this function, because each selector will
   // be viewed just once
-  public static boolean selectorMatch(
-      String origin, List<String> matches, String operator, String key) {
+  static boolean selectorMatch(String origin, List<String> matches, String operator, String key) {
     switch (origin.toLowerCase()) {
       case "language":
         if (!validOperatorForLanguageOrigin(operator)) {

internal-api/src/test/groovy/datadog/trace/bootstrap/config/provider/StableConfigParserTest.groovy

@@ -64,7 +64,6 @@ apm_configuration_rules:
     Files.delete(filePath)
   }
 
-  // TODO: This test will fail if we make selectorMatch private again
   def "test selectorMatch"() {
     when:
     // Env vars