[CSTACKEX-233] Added comment for \n split

Author: Gupta, Surya

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/IscsiAdmStorageAdaptor.java

@@ -236,6 +236,9 @@ private boolean isIscsiSessionActive(String iqn, String host, int port) {
         if (StringUtils.isBlank(sessions)) {
             return false;
         }
+        // AllLinesParser uses BufferedReader.readLine() (strips \n, \r\n, and \r) and then
+        // appends "\n" after each session. split("\n") depends on that separator to walk
+        // one session per line when multiple sessions are listed.
         for (String line : sessions.split("\n")) {
             if (line.contains(iqn) && line.contains(host)) {
                 return true;