Fix InjectEnterpriseEditionModule cop for qa/

This ensures the InjectEnterpriseEditionModule cop is able to detect the
prepend patterns used in the qa/ directory. Previously it would not
detect them as all EE QA modules reside in QA::EE, and not the top-level
EE namespace.

rubocop/cop/inject_enterprise_edition_module.rb

@@ -24,7 +24,7 @@ module RuboCop
 
         # We use `match?` here instead of RuboCop's AST matching, as this makes
         # it far easier to handle nested constants such as `EE::Foo::Bar::Baz`.
-        line.match?(/(\s|\()('|")?(::)?EE::/)
+        line.match?(/(\s|\()('|")?(::)?(QA::)?EE::/)
       end
 
       def on_send(node)

spec/rubocop/cop/inject_enterprise_edition_module_spec.rb

@@ -19,6 +19,15 @@ describe RuboCop::Cop::InjectEnterpriseEditionModule do
     SOURCE
   end
 
+  it 'flags the use of `prepend_if_ee QA::EE` in the middle of a file' do
+    expect_offense(<<~SOURCE)
+    class Foo
+      prepend_if_ee 'QA::EE::Foo'
+      ^^^^^^^^^^^^^^^^^^^^^^^^^^^ Injecting EE modules must be done on the last line of this file, outside of any class or module definitions
+    end
+    SOURCE
+  end
+
   it 'does not flag the use of `prepend_if_ee EEFoo` in the middle of a file' do
     expect_no_offenses(<<~SOURCE)
     class Foo
@@ -176,6 +185,16 @@ describe RuboCop::Cop::InjectEnterpriseEditionModule do
     SOURCE
   end
 
+  it 'disallows the use of prepend to inject a QA::EE module' do
+    expect_offense(<<~SOURCE)
+    class Foo
+    end
+
+    Foo.prepend(QA::EE::Foo)
+    ^^^^^^^^^^^^^^^^^^^^^^^^ EE modules must be injected using `include_if_ee`, `extend_if_ee`, or `prepend_if_ee`
+    SOURCE
+  end
+
   it 'disallows the use of extend to inject an EE module' do
     expect_offense(<<~SOURCE)
     class Foo