Cover case when config file is in different location than binary (#342)

Check if result of exec contains "error". This covers cases when filebeat config is not in the same directory

lib/facter/filebeat_version.rb

@@ -3,29 +3,29 @@
   confine 'kernel' => ['FreeBSD', 'OpenBSD', 'Linux', 'Windows', 'SunOS']
   if File.executable?('/usr/bin/filebeat')
     filebeat_version = Facter::Util::Resolution.exec('/usr/bin/filebeat version')
-    if filebeat_version.empty?
+    if filebeat_version.empty? or filebeat_version.include? 'error'
       filebeat_version = Facter::Util::Resolution.exec('/usr/bin/filebeat --version')
     end
   elsif File.executable?('/usr/local/bin/filebeat')
     filebeat_version = Facter::Util::Resolution.exec('/usr/local/bin/filebeat version')
-    if filebeat_version.empty?
+    if filebeat_version.empty? or filebeat_version.include? 'error'
       filebeat_version = Facter::Util::Resolution.exec('/usr/local/bin/filebeat --version')
     end
   elsif File.executable?('/opt/local/bin/filebeat')
     filebeat_version = Facter::Util::Resolution.exec('/opt/local/bin/filebeat version')
-    if filebeat_version.empty?
+    if filebeat_version.empty? or filebeat_version.include? 'error'
       filebeat_version = Facter::Util::Resolution.exec('/opt/local/bin/filebeat --version')
     end
   elsif File.executable?('/usr/share/filebeat/bin/filebeat')
     filebeat_version = Facter::Util::Resolution.exec('/usr/share/filebeat/bin/filebeat --version')
   elsif File.executable?('/usr/local/sbin/filebeat')
     filebeat_version = Facter::Util::Resolution.exec('/usr/local/sbin/filebeat version')
-    if filebeat_version.empty?
+    if filebeat_version.empty? or filebeat_version.include? 'error'
       filebeat_version = Facter::Util::Resolution.exec('/usr/local/sbin/filebeat --version')
     end
   elsif File.exist?('c:\Program Files\Filebeat\filebeat.exe')
     filebeat_version = Facter::Util::Resolution.exec('"c:\Program Files\Filebeat\filebeat.exe" version')
-    if filebeat_version.empty?
+    if filebeat_version.empty? or filebeat_version.include? 'error'
       filebeat_version = Facter::Util::Resolution.exec('"c:\Program Files\Filebeat\filebeat.exe" --version')
     end
   end