Renamed folder structure to clarify their contents

Tests/UnitTests/Core/CMakeLists.txt

@@ -20,12 +20,12 @@ endif()
 
 set(libs BornAgainCore)
 
-ADD_GTEST(Core "0"        ${libs} 0)
-ADD_GTEST(Core "1"        ${libs} 0)
-ADD_GTEST(Core "2"        ${libs} 0)
-ADD_GTEST(Core "3"        ${libs} 0)
-ADD_GTEST(Core "4"        ${libs} 0)
-ADD_GTEST(Core "5"        ${libs} 0)
-ADD_GTEST(Core "6"        ${libs} 0)
+ADD_GTEST(Core "Axes"        ${libs} 0)
+ADD_GTEST(Core "Sample"        ${libs} 0)
+ADD_GTEST(Core "Fresnel"        ${libs} 0)
+ADD_GTEST(Core "Detector"        ${libs} 0)
+ADD_GTEST(Core "Parameters"        ${libs} 0)
+ADD_GTEST(Core "DataStructure"        ${libs} 0)
+ADD_GTEST(Core "Other"        ${libs} 0)
 ADD_GTEST(Core "Numeric0" ${libs} 1)
 ADD_GTEST(Core "Numeric1" ${libs} 1)