[Ubuntu] Migrate PowerShell and Docker tests to Pester (#2317)

* PowerShell and Docker Pester tests

* no pester module

* import pester

* invoke docker with sudo

* remove native test

* add fix for az 1.0.0 module

* revert powershellget installation

* revert flag Force

* add $ProgressPreference = "SilentlyContinue"

images/linux/scripts/installers/docker-moby.sh

@@ -6,6 +6,7 @@
 
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/install.sh
+source $HELPER_SCRIPTS/invoke-tests.sh
 
 # Check to see if docker is already installed
 docker_package=moby
@@ -24,21 +25,9 @@ fi
 systemctl is-active --quiet docker.service || systemctl start docker.service
 systemctl is-enabled --quiet docker.service || systemctl enable docker.service
 
-# Run tests to determine that the software installed as expected
-echo "Testing to make sure that script performed as expected, and basic scenarios work"
-echo "Checking the docker-moby and moby-buildx"
-if ! command -v docker; then
-    echo "docker was not installed"
-    exit 1
-elif ! [[ $(docker buildx) ]]; then
-    echo "Docker-Buildx was not installed"
-    exit 1
-else
-    echo "Docker-moby and Docker-buildx checking the successfull"
-    # Docker daemon takes time to come up after installing
-    sleep 10
-    docker info
-fi
+# Docker daemon takes time to come up after installing
+sleep 10
+docker info
 
 # Pull images
 toolset="$INSTALLER_SCRIPT_FOLDER/toolset.json"
@@ -46,3 +35,5 @@ images=$(jq -r '.docker.images[]' $toolset)
 for image in $images; do
     docker pull "$image"
 done
+
+invoke_tests "Tools" "Docker"