tests: Workaround pylibssh Failed to open session

Workaround ansible pylibssh issue which causes test failures

   pylibsshext.errors.LibsshChannelException: Failed to open_session: [-2]

PR ansible/pylibssh#756 is under review
but workaround it in the meantime.

Author: justin-stephenson

.github/workflows/ci.yml

@@ -254,7 +254,7 @@ jobs:
         source .venv/bin/activate
 
         # Install system tests requirements
-        pip3 install -r ./requirements.txt
+        pip3 install -r ./requirements.txt -c ./constraints.txt
 
         # Install yq to parse yaml files
         sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64

.github/workflows/static-code-analysis.yml

@@ -74,7 +74,7 @@ jobs:
         pip3 install virtualenv
         python3 -m venv .venv
         source .venv/bin/activate
-        pip3 install -r ./requirements.txt
+        pip3 install -r ./requirements.txt -c ./constraints.txt
         pip3 install flake8 pycodestyle isort mypy black
 
     - name: flake8

src/tests/system/constraints.txt

@@ -0,0 +1,2 @@
+# Workaround SSH_AGAIN and install from https://github.com/ansible/pylibssh/pull/756
+ansible-pylibssh@git+https://github.com/justin-stephenson/pylibssh@7afce6da8ca691e07a5027bfb6751b8ffc8ca748

src/tests/system/requirements.txt

@@ -1,3 +1,4 @@
+--constraint constraints.txt
 flaky
 pytest
 git+https://github.com/next-actions/pytest-importance