OpenWIS 3.15 Branch

[solson-nws]

Creating an omnibus Singapore Release Issue to track progress with this. The OpenWIS 3 updated charter reflects key milestone dates associated with this issue.
@remy-gibault @benjaminsaclier @mgiannoni @JeyoungRyu @jude2018 @zhangz555 @yvesgoupil : Please feel free to update this issue as needed.

[jude2018]

Related risk(s) - #592, #593

Related issues - #611, #590

[solson-nws]

Changing name of branch to OpenWIS 3.15.

@remy-gibault @benjaminsaclier @mgiannoni @JeyoungRyu @jude2018 @zhangz555 @yvesgoupil : Feel free to download this branch (https://github.com/OpenWIS/openwis/tree/openwis-3.15)

@remy-gibault: Are you working on the required changes to install 3.15 based on Yves latest installation guide? Let us know.