[THREESCALE-6116] Remove Conditional Policy from the UI

[tkan145]

What

Fix https://issues.redhat.com/browse/THREESCALE-6116

More details in #1530

Verification steps

• Build image from this branch

make runtime-image IMAGE_NAME=apicast-test

• Get into dev-environment

cd dev-environments/plain-http-upstream

• Edit apicast-config.json file

diff --git a/dev-environments/plain-http-upstream/apicast-config.json b/dev-environments/plain-http-upstream/apicast-config.json
index ff944273..2643bbad 100644
--- a/dev-environments/plain-http-upstream/apicast-config.json
+++ b/dev-environments/plain-http-upstream/apicast-config.json
@@ -11,6 +11,27 @@
           "host": "backend"
         },
         "policy_chain": [
+          {
+            "name": "apicast.policy.conditional",
+            "configuration": {
+              "condition": {
+                "operations": [
+                  {
+                    "left": "{{ uri }}",
+                    "left_type": "liquid",
+                    "op": "==",
+                    "right": "/log",
+                    "right_type": "plain"
+                  }
+                ]
+              },
+              "policy_chain": [
+                {
+                  "name": "apicast.policy.phase_logger"
+                }
+              ]
+            }
+          },
           {
             "name": "apicast.policy.apicast"
           }
@@ -23,6 +44,14 @@
             "delta": 1,
             "parameters": [],
             "querystring_parameters": {}
+          },
+          {
+            "http_method": "GET",
+            "pattern": "/log",
+            "metric_system_name": "hits",
+            "delta": 1,
+            "parameters": [],
+            "querystring_parameters": {}
           }
         ]
       }

• Start gateway

make gateway IMAGE_NAME=apicast-test

• In other terminal, fetch policies, and then filter by name

curl --resolve get.example.com:8090:127.0.0.1 -v "http://get.example.com:8090/policies" 2>/dev/null | jq '.policies.conditional'

• The policy conditional does not exists
• Now send another request

curl --resolve get.example.com:8080:127.0.0.1 -v "http://get.example.com:8080/log?user_key=foo"

• You shall see phase_logger.lua:38: running phase: ... in the log