The main goal for this PR is to enable using all of the vmfloaty scenarios when

the service is set to ABS. Since ABS does not implement all the services, it
fallsback on vmpooler when needed (example increasing the lifetime value)

- Validating JSON can be parsed before parsing, as it used to throw uncaught errors
- self.list_active is returning hosts for both nspooler and vmpooler but was returning
job_ids for abs. Now standardized the returned values for use in the "modify" cli,
and created a separate list_active_job_ids for the cases where a job_id list is expected

- added a way to change the service in place for methods that do not make sense
for ABS, and instead fallback on using vmpooler in those cases:
1. summary
2. modify
3. snapshot
4. revert
5. disk
For those methods in the class itself, raising a NoMethodError, in case it is used directly

- query now returns the queue info. For information on VMs, users should use --service vmpooler
- pretty_print_hosts (used in list, and delete scenarios) will now print the job_id
ABS information and indent each VM within and print it's metadata. Useful for
knowing the running time and extending it.

- added a new utility method to get the config for the vmpooler service, used for the fallback
- added a passthrough for the vmpooler token to use when running ABS. This enables
vmpooler to track the VMs used by each token (user). Also aligns the list between
both ABS and vmpooler. Fixes the bit-bar issue where the VMs do not appear when created
via ABS

lib/vmfloaty/service.rb

@@ -7,11 +7,13 @@ require 'vmfloaty/ssh'
 
 class Service
   attr_reader :config
+  attr_accessor :silent
 
   def initialize(options, config_hash = {})
     options ||= Commander::Command::Options.new
     @config = Utils.get_service_config config_hash, options
     @service_object = Utils.get_service_object @config['type']
+    @silent = false
   end
 
   def method_missing(method_name, *args, &block)
@@ -103,6 +105,7 @@ class Service
   end
 
   def modify(verbose, hostname, modify_hash)
+    maybe_use_vmpooler
     @service_object.modify verbose, url, hostname, token, modify_hash
   end
 
@@ -115,18 +118,35 @@ class Service
   end
 
   def summary(verbose)
+    maybe_use_vmpooler
     @service_object.summary verbose, url
   end
 
   def snapshot(verbose, hostname)
+    maybe_use_vmpooler
     @service_object.snapshot verbose, url, hostname, token
   end
 
   def revert(verbose, hostname, snapshot_sha)
+    maybe_use_vmpooler
     @service_object.revert verbose, url, hostname, token, snapshot_sha
   end
 
   def disk(verbose, hostname, disk)
+    maybe_use_vmpooler
     @service_object.disk(verbose, url, hostname, token, disk)
   end
+
+  # some methods do not exist for ABS, and if possible should target the Pooler service
+  def maybe_use_vmpooler
+    if @service_object.is_a?(ABS.class)
+      if !self.silent
+        FloatyLogger.info "The service in use is ABS, but the requested method should run against vmpooler directly, using vmpooler config from ~/.vmfloaty.yml"
+        self.silent = true
+      end
+
+      @config = Utils.get_vmpooler_service_config
+      @service_object = Pooler
+    end
+  end
 end