Added export LC_ALL="en_US.UTF-8" in engine-lib for overcome locale issue.

Change-Id: I7f464293f536f267daf47e1672d8fbc74d056565
diff --git a/engine/library/engine-lib.sh b/engine/library/engine-lib.sh
index 9a2d5f4..e0f4325 100755
--- a/engine/library/engine-lib.sh
+++ b/engine/library/engine-lib.sh
@@ -113,6 +113,8 @@
 
   export LANG="C"
 
+  export LC_ALL="en_US.UTF-8"
+  
   # Set TZ to avoid the bug https://github.com/regebro/tzlocal/issues/79
   TZ=$(get_timezone)
   export TZ