Add hack to fall back to earlier simp-release-community package

lib/simp/beaker_helpers.rb

@@ -1555,17 +1555,28 @@ def install_simp_repos(suts, disable = [])
 
       os = fact_on(sut, 'os.name')
       release = fact_on(sut, 'os.release.major')
+      real_release = release.to_i
 
       # Work around Amazon 2 compatibility
       if (( os == 'Amazon' ) && ( "#{release}" == '2' ))
         release = '7'
       end
 
-      install_package_unless_present_on(
-        sut,
-        'simp-release-community',
-        "https://download.simp-project.com/simp-release-community.el#{release}.rpm"
-      )
+      begin
+        install_package_unless_present_on(
+          sut,
+          'simp-release-community',
+          "https://download.simp-project.com/simp-release-community.el#{release}.rpm"
+        )
+      rescue
+        # Hack to temporarily support new OS releases
+        release = (release.to_i - 1).to_s
+        if release.to_i - real_release > 3
+          retry
+        else
+          raise "Unsupported OS #{os} #{real_release}"
+        end
+      end
 
       # TODO: Remove this hack-around when there's a version for AL2
       if ( os == 'Amazon' )