[Ubuntu] Migrate tests for common tools to Pester (part 3) (#2337)

* add test for Git

* Add Heroku

* Add hhvm

* Add Homebrew

* Add Julia

* Add kind

* Add Kubernetes Tools

* Remove kind and homebrew validate

* replace capital letter

* Add Leiningen

* add source to Leiningen

* Add Mercurial

* Add conda

* Add Netlify

* Add packer

* Add pollinate

* Add Pulumi

* Add Phantomjs

* Add Haveged

* Fix for kubectl

* Fix julia installation

* Add installer_script_folder env variable to run tests in brew provisioner

* Add delay after reboot

* Adjust pause settings

images/linux/scripts/installers/hhvm.sh

@@ -4,29 +4,11 @@
 ##  Desc:  Installs hhvm
 ################################################################################
 
-# Source the helpers for use with the script
-source $HELPER_SCRIPTS/install.sh
+source $HELPER_SCRIPTS/invoke-tests.sh
 
-hhvm_package=hhvm
+apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xB4112585D386EB94
+add-apt-repository https://dl.hhvm.com/ubuntu
+apt-get update
+apt-get -qq install -y hhvm
 
-# Test to see if the software in question is already installed, if not install it
-echo "Checking to see if the installer script has already been run"
-if ! IsPackageInstalled ${hhvm_package}; then
-    apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xB4112585D386EB94
-    add-apt-repository https://dl.hhvm.com/ubuntu
-    apt-get update
-    apt-get -qq install -y hhvm
-else
-    echo "${hhvm_package} already installed"
-fi
-
-# Run tests to determine that the software installed as expected
-echo "Testing to make sure that script performed as expected, and basic scenarios work"
-if ! IsPackageInstalled ${hhvm_package}; then
-    echo "${hhvm_package} was not installed"
-    exit 1
-fi
-
-if ! command -v hhvm; then
-    exit 1
-fi
+invoke_tests "Tools" "HHVM"