add --print-imstallation-path cli option

Author: olegantonyan

exe/omnipackage-agent

@@ -29,6 +29,10 @@ optparser = ::OptionParser.new do |parser|
     exit
   end
   parser.on('-c', '--config CONFIG_FILE', 'path to config file')
+  parser.on('--print-imstallation-path', 'print to stdout the installation path') do
+    puts ::File.expand_path('..', __dir__)
+    exit
+  end
 end
 optparser.parse!(into: options)