eNMS 3.18.2

• Fix subworkflow iteration bug
• Fix workflow display with same shared services in multiple subworkflows
• Fix task / run cascade deletion bug on MySQL
• Add "devices" keyword for result postprocessing
• Allow restart from top-level workflow when restarting from a subworkflow service
• New "Skip value" property to decide whether skip means success or failure
• Fix the workflow builder progress display when devices are skipped. Now eNMS shows how many devices
  are skipped, and it no longer shows anything when it's 0 ("0 failed", "0 passed" etc are no longer displayed)
• Netmiko session log code improvement for netmiko validation / prompt service