(GH-C&T-7) Remove code specific to unsupported OSs

Author: david22swan

provision.yaml

@@ -17,8 +17,6 @@ travis_deb:
 travis_ub_6:
   provisioner: docker
   images:
-  - litmusimage/ubuntu:14.04
-  - litmusimage/ubuntu:16.04
   - litmusimage/ubuntu:18.04
   - litmusimage/ubuntu:20.04
 travis_el7:
@@ -42,11 +40,8 @@ release_checks_6:
   - oracle-6-x86_64
   - scientific-6-x86_64
   - scientific-7-x86_64
-  - debian-8-x86_64
   - debian-9-x86_64
   - debian-10-x86_64
-  - ubuntu-1404-x86_64
-  - ubuntu-1604-x86_64
   - ubuntu-1804-x86_64
   - ubuntu-2004-x86_64
   - sles-11-x86_64

spec/acceptance/acceptance_1_readme_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper_acceptance'
 
 confine_array = [
-  (os[:family] =~ %r{debian|ubuntu} &&  (os[:release] == '16.04' || os[:release] == '18.04' || os[:release] == '8')),
+  (os[:family] =~ %r{debian|ubuntu} &&  os[:release] == '18.04'),
   (os[:family].include?('redhat')   &&  os[:release].start_with?('5')),
 ]
 stop_test = confine_array.any?

spec/acceptance/acceptance_1b_spec.rb

@@ -15,12 +15,10 @@
 
   let :java_home do
     if os[:family].match?(%r{debian|ubuntu})
-      if os[:release] == '20.04' || os[:release] == '18.04' || os[:release].start_with?('11') || os[:release].start_with?('10')
-        '"/usr/lib/jvm/java-11-openjdk-${::architecture}"'
-      elsif os[:release] == '16.04' || os[:release].start_with?('9')
+      if os[:release].start_with?('9')
         '"/usr/lib/jvm/java-8-openjdk-${::architecture}"'
       else
-        '"/usr/lib/jvm/java-7-openjdk-${::architecture}"'
+        '"/usr/lib/jvm/java-11-openjdk-${::architecture}"'
       end
     elsif os[:family].include?('redhat')
       '"/etc/alternatives/java_sdk"'