MCOL-641 This commit introduces GTest Suite into CS.

Binary NULL magic now consists of a series of BINARYEMPTYROW-s + BINARYNULL
in the end.

ByteStream now has hexbyte alias.

Added ColumnCommand::getEmptyRowValue to support 16 byte EMPTY values.

cmake/FindGTest.cmake

@@ -0,0 +1,38 @@
+find_path(GTEST_ROOT_DIR
+    NAMES include/gtest/gtest.h
+)
+
+find_library(GTEST_LIBRARY
+    NAMES gtest 
+    HINTS ${GTEST_ROOT_DIR}/lib
+)
+
+find_library(GTESTMAIN_LIBRARY
+    NAMES gtest_main 
+    HINTS ${GTEST_ROOT_DIR}/lib
+)
+
+find_library(PTHREAD_LIBRARY
+    NAMES pthread 
+    HINTS ${GTEST_ROOT_DIR}/lib
+)
+
+
+find_path(GTEST_INCLUDE_DIR
+    NAMES gtest.h
+    HINTS ${GTEST_ROOT_DIR}/include
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GTest DEFAULT_MSG
+    GTEST_LIBRARY
+    GTESTMAIN_LIBRARY
+    PTHREAD_LIBRARY
+    GTEST_INCLUDE_DIR
+)
+
+mark_as_advanced(
+    GTEST_ROOT_DIR
+    GTEST_LIBRARIES
+    GTEST_INCLUDE_DIR
+)