Cherry-pick "Merge branch 'master-scipy' into 'master'" into 1.0

add find module for scipy

See merge request !962 (merged)

(cherry picked from commit 34e69b18)

• 418dae21 Findscipy.cmake to be added
• 469fa824 Findscipy.cmake to be added
• 41ba9767 add find module for scipy