Packaging test updated to more recent CMake version and unused code

removed.

test_package/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 3.11)
 project(PackageTest CXX)
 
 include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
 add_executable(example example.cpp)
 target_link_libraries(example ${CONAN_LIBS})
 
-# CTest is a testing tool that can be used to test your project.
-# enable_testing()
-# add_test(NAME example
-#          WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin
-#          COMMAND example)