[PLAT-3213] Fixed "PLAT-2994 broken universe creation"

Summary: Command output: prefix was removed from run_node_action.py - hence template check in CreateTable.java stopped working. This fixes the broken universe creation.

Test Plan: Manually tested.

Reviewers: amalyshev

Reviewed By: amalyshev

Subscribers: jenkins-bot

Differential Revision: https://phabricator.dev.yugabyte.com/D15635

managed/devops/bin/run_node_action.py

@@ -37,6 +37,7 @@ def add_run_command_subparser(subparsers, command, parent):
 
 def handle_run_command(args, client):
     output = client.exec_command(args.command)
+    print('Command output:')
     print(output)
 
 

managed/src/main/java/com/yugabyte/yw/common/supportbundle/UniverseLogsComponent.java

@@ -159,7 +159,15 @@ public List<String> getNodeFilePaths(
 
     ShellResponse shellOutput = this.nodeUniverseManager.runCommand(node, universe, cmd);
     String cmdOutput = shellOutput.message;
-    return Arrays.asList(cmdOutput.trim().split("\n", 0));
+    List<String> cmdOutputList = Arrays.asList(cmdOutput.trim().split("\n", 0));
+    // Removes all warnings before string "Command output:"
+    int lastIndex = 0;
+    for (int i = 0; i < cmdOutputList.size(); ++i) {
+      if (cmdOutputList.get(i).contains("Command output:")) {
+        lastIndex = i;
+      }
+    }
+    return cmdOutputList.subList(lastIndex + 1, cmdOutputList.size());
   }
 
   // Filters a list of log file paths with a regex pattern and between given start and end dates