Revert "Merge branch 'branch-0.3.1' into 'branch-0.3.1'"

This reverts merge request !264

Former-commit-id: 501e92946ab87fb9a21c55545f84ab8da499e1aa

cpp/build.sh

@@ -8,7 +8,7 @@ MAKE_CLEAN="OFF"
 BUILD_COVERAGE="OFF"
 DB_PATH="/opt/milvus"
 PROFILING="OFF"
-BUILD_FAISS_WITH_MKL="OFF"
+BUILD_FAISS_WITH_MKL="ON"
 
 while getopts "p:d:t:uhlrcgm" arg
 do

cpp/cmake/ThirdPartyPackages.cmake

@@ -700,7 +700,7 @@ endmacro()
 # FAISS
 
 if(NOT DEFINED BUILD_FAISS_WITH_MKL)
-    set(BUILD_FAISS_WITH_MKL OFF)
+    set(BUILD_FAISS_WITH_MKL ON)
 endif()
 
 if(EXISTS "/proc/cpuinfo")