Werk #3203: Distributed WATO: Fixed exception in remote host service discovery

Fixed an exception which could occur during automation calls between distributed sites:

2016-02-15 13:49:14 [3] [13761] /heute/check_mk/wato.py Internal error: Traceback (most recent call last):
  File "/omd/sites/heute/share/check_mk/web/htdocs/index.py", line 131, in handler
    handler()
  File "/omd/sites/heute/share/check_mk/web/htdocs/wato.py", line 188, in page_handler
    result = modefunc("action")
  File "/omd/sites/heute/share/check_mk/web/htdocs/wato.py", line 15850, in <lambda>
    "inventory"          : (["hosts"], lambda phase: mode_inventory(phase, False)),
  File "/omd/sites/heute/share/check_mk/web/htdocs/wato.py", line 2669, in mode_inventory
    check_mk_automation(host.site_id(), "set-autochecks", [hostname], active_checks)
  File "/omd/sites/heute/share/check_mk/web/htdocs/watolib.py", line 3878, in check_mk_automation
    return check_mk_remote_automation(siteid, command, args, indata, stdin_data, timeout)
  File "/omd/sites/heute/share/check_mk/web/htdocs/watolib.py", line 3072, in check_mk_remote_automation
    ("timeout",    mk_repr(indata)),     # The timeout
  File "/omd/sites/heute/share/check_mk/web/htdocs/watolib.py", line 3099, in do_remote_automation
    raise MKAutomationException("&lt;pre&gt;%s&lt;/pre&gt; % response)
MKAutomationException: &lt;pre&gt;d format: a number is required, not dictTraceback (most recent call last):
  File &quot;/omd/sites/slave/share/check_mk/web/htdocs/index.py&quot;, line 63, in handler
    handler()
  File &quot;/omd/sites/slave/share/check_mk/web/htdocs/wato.py&quot;, line 9515, in page_automation
    result = check_mk_local_automation(cmk_command, args, indata, stdin_data, timeout)
  File &quot;/omd/sites/slave/share/check_mk/web/htdocs/watolib.py&quot;, line 3883, in check_mk_local_automation
    args = [ &quot;--timeout&quot;, &quot;%d&quot; % timeout ] + args
TypeError: %d format: a number is required, not dic

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