fix comments, add ignores

.gitignore

@@ -4,5 +4,7 @@
 tmp*
 broker
 target
+obj
+bin
 .vscode
 amq-clients-2.10.4-dotnet-core

java-jms-plain/metrics-collector/src/main/java/com/redhat/training/collector/CollectMetric.java

@@ -17,7 +17,7 @@ public class CollectMetric {
     public static void main(String... args) {
         Logger LOG = LoggerFactory.getLogger(CollectMetric.class);
 
-        // prepare connection objects
+        // declare connection objects
         InitialContext ctx;
         ConnectionFactory cf;
         Connection c;

java-jms-plain/metrics-sender/src/main/java/com/redhat/training/sender/SendMetric.java

@@ -26,7 +26,7 @@ public class SendMetric {
         long threadId = Thread.currentThread().getId();
         long oldTime = 0;
 
-        // prepare connection objects
+        // declare JMS objects
         InitialContext ctx;
         ConnectionFactory cf;
         Connection c;