MLNX ci: Recursively clone all repos.

Now that prrte/pmix have submodules themselves, this is necessary.

Signed-off-by: Austen Lauria <[email protected]>

Author: awlauria

.ci/mellanox/azure-pipelines.yml

@@ -25,7 +25,7 @@ jobs:
       --ulimit memlock=-1 --security-opt seccomp=unconfined --cap-add=SYS_ADMIN --device=/dev/infiniband/
   steps:
   - checkout: self
-    submodules: true
+    submodules: recursive
     path: ompi
     clean: true
   - bash: |