Fix #3581 declare PubMatic support for openRTB 2.6 (#3623)

Author: EmilNadimanov

src/main/resources/bidder-config/pubmatic.yaml

@@ -1,6 +1,7 @@
 adapters:
   pubmatic:
     endpoint: https://hbopenbid.pubmatic.com/translator?source=prebid-server
+    ortb-version: "2.6"
     meta-info:
       maintainer-email: [email protected]
       app-media-types:

src/test/resources/org/prebid/server/it/openrtb2/pubmatic/test-auction-pubmatic-request.json

@@ -49,9 +49,7 @@
   ],
   "tmax": 5000,
   "regs": {
-    "ext": {
-      "gdpr": 0
-    }
+    "gdpr": 0
   },
   "ext": {
     "prebid": {

src/test/resources/org/prebid/server/it/openrtb2/pubmatic/test-pubmatic-bid-request.json

@@ -12,7 +12,7 @@
         "h": 600
       },
       "tagid": "slot9",
-      "bidfloor" : 0.12,
+      "bidfloor": 0.12,
       "ext": {
         "ae": 1,
         "pmZoneId": "Zone1,Zone2",
@@ -45,9 +45,7 @@
     "USD"
   ],
   "regs": {
-    "ext": {
-      "gdpr": 0
-    }
+    "gdpr": 0
   },
   "ext": {
     "prebid": {