[BUG] Unable to connect with SSH with VMSS after RDMA installation

I had an image without RDMA. Creating VMSS with that worked normally. I installed RDMA with these instructions https://docs.microsoft.com/en-us/azure/virtual-machines/workloads/hpc/enable-infiniband#manually-install-mellanox-ofed and created a new image. After that I'm no longer able to access the VMs (which are created with the new image). SSH just hangs and eventually times out. I have tested this couple of times and RDMA steps seems to be the one which makes accessing VMs fail.

I tried to enable boot diagnostics but couldn't get that to work. I have it on for the vmss but when I inspect boot diagnostics setup for the VMs it says that enable it for VMSS. Tried this couple of times and restarted the vms

```
waagent --version
WALinuxAgent-2.2.45 running on ubuntu 18.04
Python: 3.6.9
Goal state agent: 2.2.49.2
```

- Ubuntu 18.04 from microsoft-dsvm:ubuntu-1804:1804:20.05.13
- MLNX_OFED_LINUX-5.0-2.1.8.0-ubuntu18.04-x86_64 (RDMA)


What could I do to fix this? I need RDMA installed since I don't want to run the installation on each machine. I might potentially use close to hundred vms. Installation takes some time so even automating it is not a good solution.