Update Chef dependency to Chef 11

Also add dependency on json <= 1.7.7, required by Chef 11.

Resolves problem: Bundler could not find compatible versions for gem
"json" (required for chef and berkshelf).

Partial fix for bug #1183540

Change-Id: I422eb3423ab2ac9234c7e19707909ff7423f5be9

Gemfile

@@ -1,6 +1,7 @@
 source "https://rubygems.org"
 
-gem "chef", "~> 10.18.2"
+gem "chef", "~> 11.4.4"
+gem "json", "<= 1.7.7" # chef 11 dependency
 gem "berkshelf",  "~> 1.4.0"
 gem "chefspec", "~> 1.2.0"
 gem "foodcritic", "~> 2.1.0"

Gemfile.lock

@@ -26,26 +26,21 @@ GEM
       thor (~> 0.18.0)
       yajl-ruby
     builder (3.2.2)
-    bunny (0.7.9)
     celluloid (0.14.1)
       timers (>= 1.0.0)
-    chef (10.18.2)
-      bunny (>= 0.6.0, < 0.8.0)
+    chef (11.4.4)
       erubis
       highline (>= 1.6.9)
-      json (>= 1.4.4, <= 1.6.1)
+      json (>= 1.4.4, <= 1.7.7)
       mixlib-authentication (>= 1.3.0)
-      mixlib-cli (>= 1.1.0)
+      mixlib-cli (~> 1.3.0)
       mixlib-config (>= 1.1.2)
       mixlib-log (>= 1.3.0)
       mixlib-shellout
-      moneta (< 0.7.0)
-      net-ssh (~> 2.2.2)
+      net-ssh (~> 2.6)
       net-ssh-multi (~> 1.1.0)
       ohai (>= 0.6.0)
       rest-client (>= 1.0.4, < 1.7.0)
-      treetop (~> 1.4.9)
-      uuidtools
       yajl-ruby (~> 1.1)
     chefspec (1.2.0)
       chef (>= 10.0)
@@ -91,7 +86,7 @@ GEM
       rack
     i18n (0.6.1)
     ipaddress (0.8.0)
-    json (1.6.1)
+    json (1.7.7)
     little-plugger (1.1.3)
     logging (1.6.2)
       little-plugger (>= 1.1.3)
@@ -108,14 +103,13 @@ GEM
     mixlib-config (1.1.2)
     mixlib-log (1.6.0)
     mixlib-shellout (1.1.0)
-    moneta (0.6.0)
-    multi_json (1.7.5)
-    multi_xml (0.5.3)
+    multi_json (1.7.6)
+    multi_xml (0.5.4)
     multipart-post (1.2.0)
     net-http-persistent (2.8)
-    net-ssh (2.2.2)
-    net-ssh-gateway (1.1.0)
-      net-ssh (>= 1.99.1)
+    net-ssh (2.6.7)
+    net-ssh-gateway (1.2.0)
+      net-ssh (>= 2.6.5)
     net-ssh-multi (1.1)
       net-ssh (>= 2.1.4)
       net-ssh-gateway (>= 0.99.0)
@@ -173,7 +167,7 @@ GEM
     systemu (2.5.2)
     thor (0.18.1)
     timers (1.1.0)
-    treetop (1.4.12)
+    treetop (1.4.14)
       polyglot
       polyglot (>= 0.3.1)
     uuidtools (2.1.4)
@@ -194,6 +188,7 @@ PLATFORMS
 
 DEPENDENCIES
   berkshelf (~> 1.4.0)
-  chef (~> 10.18.2)
+  chef (~> 11.4.4)
   chefspec (~> 1.2.0)
   foodcritic (~> 2.1.0)
+  json (<= 1.7.7)