Add more discriminating properties to the daemon

The local repo and maven settings are both used while resolving core extensions,
which happens during daemon startup. Thus these two also need to be discriminating
properties, as the core extensions themselves are discriminating.

common/src/main/java/org/mvndaemon/mvnd/common/Environment.java

@@ -94,9 +94,16 @@ public enum Environment {
     // Maven properties
     //
     /** The path to the Maven local repository */
-    MAVEN_REPO_LOCAL("maven.repo.local", null, null, OptionType.PATH, Flags.NONE),
+    MAVEN_REPO_LOCAL("maven.repo.local", null, null, OptionType.PATH, Flags.DISCRIMINATING | Flags.OPTIONAL),
     /** The location of the maven settings file */
-    MAVEN_SETTINGS("maven.settings", null, null, OptionType.PATH, Flags.NONE, "mvn:-s", "mvn:--settings"),
+    MAVEN_SETTINGS(
+            "maven.settings",
+            null,
+            null,
+            OptionType.PATH,
+            Flags.DISCRIMINATING | Flags.OPTIONAL,
+            "mvn:-s",
+            "mvn:--settings"),
     /** The pom or directory to build */
     MAVEN_FILE(null, null, null, OptionType.PATH, Flags.NONE, "mvn:-f", "mvn:--file"),
     /** The root directory of the current multi module Maven project */