Update install-p4-tools.sh to use P4Runtime v1.0

Includes also various improvements to the p4vm scripts, such as:
- Choose to build VM with Ubuntu 16.04 or 18.04 (experimental)
- Allow users to specify version of protobuf and grpc to use
- Avoid building protobuf and grpc if already installed in the system
- Install Bazel 0.22

Also:
- Remove check for invalid group member weights (now PI always returns
members with weight 1)
- Re-compiled all P4 programs and fixed missing padding in controller
packet headers

Change-Id: I0e672fcebbaba63354c749f0c774af251f3cbc6c
diff --git a/pipelines/fabric/src/main/resources/p4c-out/fabric/bmv2/default/p4info.txt b/pipelines/fabric/src/main/resources/p4c-out/fabric/bmv2/default/p4info.txt
index b91f305..d8ce747 100644
--- a/pipelines/fabric/src/main/resources/p4c-out/fabric/bmv2/default/p4info.txt
+++ b/pipelines/fabric/src/main/resources/p4c-out/fabric/bmv2/default/p4info.txt
@@ -1,3 +1,6 @@
+pkg_info {
+  arch: "v1model"
+}
 tables {
   preamble {
     id: 33611649
@@ -89,7 +92,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318770289
@@ -112,7 +116,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318830507
@@ -138,7 +143,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318811107
@@ -258,7 +264,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318768144
@@ -290,7 +297,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318778156
@@ -319,7 +327,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   implementation_id: 285217164
@@ -343,7 +352,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318801752
@@ -372,7 +382,8 @@
   }
   action_refs {
     id: 16819938
-    annotations: "@defaultonly()"
+    annotations: "@defaultonly"
+    scope: DEFAULT_ONLY
   }
   const_default_action_id: 16819938
   direct_resource_ids: 318827144
@@ -779,6 +790,7 @@
   preamble {
     id: 67146229
     name: "packet_in"
+    alias: "packet_in"
     annotations: "@controller_header(\"packet_in\")"
   }
   metadata {
@@ -796,6 +808,7 @@
   preamble {
     id: 67121543
     name: "packet_out"
+    alias: "packet_out"
     annotations: "@controller_header(\"packet_out\")"
   }
   metadata {