Tests: Simplify and document policy scopes in RunCMake.CMP* tests

Drop unnecessary NO_POLICY_SCOPE options.  Document why the remaining
options are necessary.

Tests/RunCMake/CMP0028/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.4)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE) # policy used at end of dir

Tests/RunCMake/CMP0037/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.4)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0039/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.12)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0040/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.12)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0041/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.4)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0042/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.4)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0043/CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.8.4)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE) # policy used at end of dir
 
 if(CMAKE_BUILD_TYPE)
   # Dummy variable use

Tests/RunCMake/CMP0045/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.4)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0049/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.12)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMP0050/CMakeLists.txt

@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.12)
 project(${RunCMake_TEST} CXX)
-include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
+include(${RunCMake_TEST}.cmake)