Refactors (vesoft-inc#258)

* Refactor

1) Refactor: renamed RocksdbEngine to RocksEngine
2) Refactor: Combined RocksdbConfigFlags and RocksdbConfigOptions to RocksEngineConfig
3) Cleaned up RocksdbConfigTest and renamed it to RocksEngineConfigTest
4) Modified third-parties build.sh files to make the build support Ubuntu
5) Modified main CMakeFiles.txt to properly handle libLZMA

* Rebased and addressed @dutor's comments

CMakeLists.txt

@@ -141,6 +141,7 @@ find_package(BISON REQUIRED)
 find_package(FLEX REQUIRED)
 find_package(Readline REQUIRED)
 find_package(NCURSES REQUIRED)
+find_package(LibLZMA MODULE)
 if(NOT asan AND NOT ENABLE_NATIVE)
  find_package(PCHSupport)
  add_compile_options(-Winvalid-pch)
@@ -236,6 +237,10 @@ set(ROCKSDB_LIBRARIES ${NEBULA_HOME}/third-party/rocksdb/_install/lib/librocksdb
 
 # All compression libraries
 set(COMPRESSION_LIBRARIES bz2 snappy zstd z)
+if (LIBLZMA_FOUND)
+ include_directories(SYSTEM ${LIBLZMA_INCLUDE_DIRS})
+ list(APPEND COMPRESSION_LIBRARIES ${LIBLZMA_LIBRARIES})
+endif()
 
 if (NOT ENABLE_JEMALLOC)
  set(JEMALLOC_LIB )
@@ -262,9 +267,9 @@ macro(nebula_link_libraries target)
  ${OPENSSL_CRYPTO_LIBRARY}
  ${KRB5_LIBRARIES}
  ${COMPRESSION_LIBRARIES}
- dl
  ${JEMALLOC_LIB}
  ${LIBUNWIND_LIBRARIES}
+ dl
  -pthread
  )
 endmacro(nebula_link_libraries)