Implement version names for each Memgraph version

Summary:
With this diff, each build of Memgraph has a version that uniquely identifies
it. The given version uniquely identifies both official release builds and
development builds. Enterprise/community builds are also differentiated in the
version.  Also, support for custom suffixes is added to support custom builds
for customers.

Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2662

tools/CMakeLists.txt

@@ -1,7 +1,7 @@
 # MemGraph Tools CMake configuration
 # You should use the top level CMake configuration with -DTOOLS=ON option set.
 
-project(memgraph_tools VERSION ${memgraph_VERSION})
+project(memgraph_tools)
 
 disallow_in_source_build()
 

tools/src/CMakeLists.txt

@@ -1,5 +1,5 @@
 # Generate a version.hpp file
-set(VERSION_STRING ${memgraph_VERSION})
+set(VERSION_STRING ${MEMGRAPH_VERSION})
 configure_file(../../src/version.hpp.in version.hpp @ONLY)
 include_directories(${CMAKE_CURRENT_BINARY_DIR})