JON install fails on Solaris with 'sleep: bad character in argument' printed many times

Issue

• Installation fails at the very end

• Install fails with the following warnings and errors:

  Trying to stop the RHQ Server...
  RHQ Server (pid=16104) is stopping...
  sleep: bad character in argument
  sleep: bad character in argument
  sleep: bad character in argument
  ...
  cat: cannot open /opt/jboss/jboss-on/jon-server/bin/internal/rhq-jvm.pid
  sleep: bad character in argument
  RHQ Server has stopped.
  Stopping RHQ storage node...
  RHQ storage node (pid=15984) is stopping...
  ERROR [org.rhq.server.control.RHQControl] Process [15984] did not finish yet. Terminate it manually and retry.
  WARN  [org.rhq.server.control.command.Install] UNDO: Removing agent install directory
  WARN  [org.rhq.server.control.command.Install] UNDO: Removing server-installed marker file and management user
  WARN  [org.rhq.server.control.command.Install] UNDO: Stopping component: --server
  WARN  [org.rhq.server.control.command.Install] UNDO: Stopping component: --storage
  WARN  [org.rhq.server.control.command.Install] UNDO: Removing storage node data and install directories
  WARN  [org.rhq.server.control.command.Install] UNDO: Reverting server properties file