Update the platforms we test on

Signed-off-by: Tim Smith <tsmith@chef.io>

.kitchen.dokken.yml

@@ -19,13 +19,6 @@ platforms:
     image: dokken/amazonlinux
     pid_one_command: /sbin/init
 
-- name: debian-7
-  driver:
-    image: dokken/debian-7
-    pid_one_command: /sbin/init
-    intermediate_instructions:
-      - RUN /usr/bin/apt-get update
-
 - name: debian-8
   driver:
     image: dokken/debian-8
@@ -72,4 +65,4 @@ platforms:
 - name: opensuse-leap
   driver:
     image: dokken/opensuse-leap
-    pid_one_command: /bin/systemd
+    pid_one_command: /bin/systemd

.kitchen.yml

@@ -14,10 +14,9 @@ platforms:
       box: mvbcoding/awslinux
   - name: centos-6
   - name: centos-7
-  - name: debian-7
   - name: debian-8
   - name: debian-9
-  - name: fedora-26
+  - name: fedora-28
   - name: opensuse-leap-42
   - name: ubuntu-14.04
   - name: ubuntu-16.04

.travis.yml

@@ -29,7 +29,6 @@ env:
   - INSTANCE=default-fedora-latest
   - INSTANCE=instance-ubuntu-1404
   - INSTANCE=instance-ubuntu-1604
-  - INSTANCE=instance-debian-7
   - INSTANCE=instance-debian-8
   - INSTANCE=instance-debian-9
   - INSTANCE=instance-centos-6

Gemfile

@@ -6,5 +6,4 @@
 
 source 'https://rubygems.org'
 
-gem 'stove'
 gem 'community_cookbook_releaser'