Resolve "Add "route" optional field to header"

Closes #96 (closed)

examples/mas-dt/mission_plan.json

     "version": 2,
     "source": "autonomy_engine",
     "destination": "soar.noc.autosub.alr-52.to_platform.mission_plan",
+    "route": ["proj-x-relay", "internal-relay"],
     "delivery_type": "publish",
     "encoded": false
   },

examples/mas-dt/planning_configuration.json

     "version": 2,
     "source": "noc-c2",
     "destination": "",
+    "route": ["proj-x-relay", "internal-relay"],
     "delivery_type": "broadcast",
     "encoded": false
   },

examples/mas-dt/platform_instruction_set.json

     "version": 1,
     "source": "ori",
     "destination": "mas-dt.noc.slocum.unit_111.to_platform.platform_instruction_set",
+    "route": ["proj-x-relay", "internal-relay"],
     "delivery_type": "publish",
     "encoded": false
   },

examples/mas-dt/platform_status_branch.json

         "version": "dev",
         "source": "noc-sfmc",
         "destination": "mas-dt.noc.slocum.unit_xxx.from_platform.platform_status",
+        "route": ["proj-x-relay", "internal-relay"],
         "delivery_type": "publish",
         "encoded": false
     },

examples/mas-dt/platform_status_commit.json

         "version": "2bbede2412f9038c0b1ecd8c2965532ea97264a3",
         "source": "noc-sfmc",
         "destination": "mas-dt.noc.slocum.unit_xxx.from_platform.platform_status",
+        "route": ["mas-dt-relay", "internal-relay"],
         "delivery_type": "publish",
         "encoded": false
     },