Move unit test to a new directory

The current "test" directory was a mixture of automatic unit tests,
content for manual tests and example web paged.
Move the source for automatic unit tests (CI tests) to a new
directory.

CMakeLists.txt

@@ -480,7 +480,7 @@ if (CIVETWEB_BUILD_TESTING)
   mark_as_advanced(CIVETWEB_CHECK_MD5_HASH)
 
   # Build the testing
-  add_subdirectory(test)
+  add_subdirectory(unittest)
 endif()
 
 # Set up CPack

test/CMakeLists.txt → unittest/CMakeLists.txt

@@ -222,7 +222,7 @@ if (${CMAKE_BUILD_TYPE} MATCHES "[Cc]overage")
       COMMAND ${CTEST_EXECUTABLE} --force-new-ctest-process
       COMMAND ${LCOV_EXECUTABLE} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
       COMMAND ${LCOV_EXECUTABLE} -q -a before.lcov -a after.lcov --output-file final.lcov
-      COMMAND ${LCOV_EXECUTABLE} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
+      COMMAND ${LCOV_EXECUTABLE} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/unittest/*'" -o final.lcov
       COMMAND ${GENHTML_EXECUTABLE} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_SOURCE_DIR}" -t benchmark
       DEPENDS main-c-unit-test
       WORKING_DIRECTORY ${CMAKE_BINARY_DIR}