fix: make sure we could apply the getParent() method on confPath whil…

…e it is a file name only.

❯ java -jar build/libs/solconfig.jar create default.json
java.lang.NullPointerException: Cannot invoke "java.nio.file.Path.toFile()" because the return value of "java.nio.file.Path.getParent()" is null
	at com.solace.tools.solconfig.SempClient.freeMakerToString(SempClient.java:223)
	at com.solace.tools.solconfig.SempClient.readMapFromJsonFile(SempClient.java:211)
	at com.solace.tools.solconfig.Commander.getConfigBrokerFromFile(Commander.java:112)
	at com.solace.tools.solconfig.Commander.create(Commander.java:98)
	at com.solace.tools.solconfig.cli.CreateCommand.execute(CreateCommand.java:24)
	at com.solace.tools.solconfig.cli.SubCommand.call(SubCommand.java:15)
	at com.solace.tools.solconfig.cli.SubCommand.call(SubCommand.java:7)
	at picocli.CommandLine.executeUserObject(CommandLine.java:1953)
	at picocli.CommandLine.access$1300(CommandLine.java:145)
	at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2352)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2346)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2311)
	at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2179)
	at picocli.CommandLine.execute(CommandLine.java:2078)
	at com.solace.tools.solconfig.App.main(App.java:11)

src/main/java/com/solace/tools/solconfig/SempClient.java

@@ -220,7 +220,7 @@ public static Map<String, Object> readMapFromJsonFile(Path confPath) {
     private static String freeMakerToString(Path confPath) {
         try {
             Configuration cfg = new Configuration(Configuration.VERSION_2_3_31);
-            cfg.setDirectoryForTemplateLoading(confPath.getParent().toFile());
+            cfg.setDirectoryForTemplateLoading(confPath.toAbsolutePath().getParent().toFile());
             cfg.setDefaultEncoding("UTF-8");
             cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
             cfg.setLogTemplateExceptions(false);