Partial veneer GAPIC refresh (#600)

* Partial veneer changes for vision

* Update from <API>Gapic to <API>GapicClient

* Refresh GAPIC clients with partial veneer changes

* Fix DLP client

* Remove unsupported pubsub methods

* Refresh with latest generator changes

* Update composer files, Spanner connection and tests

* Refresh with moved GapicClient objects

composer.json

@@ -57,8 +57,8 @@
         "league/json-guard": "^0.3",
         "erusev/parsedown": "^1.6",
         "vierbergenlars/php-semver": "^3.0",
-        "google/proto-client": "^0.21.0",
-        "google/gax": "^0.21.0",
+        "google/proto-client": "^0.22.0",
+        "google/gax": "^0.22.1",
         "symfony/lock": "3.3.x-dev#1ba6ac9",
         "phpseclib/phpseclib": "^2"
     },
@@ -114,4 +114,4 @@
             "entry": "ServiceBuilder.php"
         }
     }
-}
+}