switching spdk to https
[submodule "submodules/spdk"]
path = submodules/spdk
- url = git@github.com:demikernel/spdk.git
+ url = https://github.com/demikernel/spdk.git
branch = irene/v19.10.x
[submodule "submodules/Heap-Layers"]
path = submodules/Heap-Layers
