Tests/RunCMake/property_init: test 'always' properties

All targets get these targets initialized.

Tests/RunCMake/property_init/Always.cmake

@@ -0,0 +1,15 @@
+set(properties
+  # property                      expected  alias
+  # Test a property which should never be initialized.
+  "notset"                        "<UNSET>" "<SAME>"
+
+  # Build graph properties
+  "VERIFY_INTERFACE_HEADER_SETS"  "TRUE"    "<SAME>"
+
+  # Metadata
+  "FOLDER"                        "folder"  "<SAME>"
+  )
+
+prepare_target_types(always ${all_target_types})
+
+run_property_tests(always properties)

Tests/RunCMake/property_init/RunCMakeTest.cmake

@@ -1 +1,3 @@
 include(RunCMake)
+
+run_cmake(Always)