Simplify domain language to just "boot" and unscoped config keys

test/cli/app_test.rb

@@ -40,7 +40,7 @@ class CliAppTest < CliTestCase
     # Strategy is used when booting the containers
     Mrsk::Cli::App.any_instance.expects(:on).with([ "1.1.1.1" ], in: :groups, limit: 3, wait: 2).with_block_given
 
-    run_command("boot", config: :with_group_strategy)
+    run_command("boot", config: :with_boot_strategy)
   end
 
   test "start" do

test/commander_test.rb

@@ -55,19 +55,19 @@ class CommanderTest < ActiveSupport::TestCase
   end
 
   test "default group strategy" do
-    assert_empty @mrsk.group_strategy
+    assert_empty @mrsk.boot_strategy
   end
 
   test "specific limit group strategy" do
-    configure_with(:deploy_with_group_strategy)
+    configure_with(:deploy_with_boot_strategy)
 
-    assert_equal({ in: :groups, limit: 3, wait: 2 }, @mrsk.group_strategy)
+    assert_equal({ in: :groups, limit: 3, wait: 2 }, @mrsk.boot_strategy)
   end
 
   test "percentage-based group strategy" do
-    configure_with(:deploy_with_precentage_group_strategy)
+    configure_with(:deploy_with_precentage_boot_strategy)
 
-    assert_equal({ in: :groups, limit: 1, wait: 2 }, @mrsk.group_strategy)
+    assert_equal({ in: :groups, limit: 1, wait: 2 }, @mrsk.boot_strategy)
   end
 
   private

test/fixtures/deploy_with_boot_strategy.yml

@@ -13,5 +13,5 @@ registry:
   password: pw
 
 boot:
-  group_limit: 3
-  group_wait: 2
+  limit: 3
+  wait: 2

test/fixtures/deploy_with_precentage_boot_strategy.yml

@@ -13,5 +13,5 @@ registry:
   password: pw
 
 boot:
-  group_limit: 25%
-  group_wait: 2
+  limit: 25%
+  wait: 2