utils/run-tests.sh: Install Ansible collections on virtual environment

When runing tests using 'utils/run-tests.sh' from inside an existing
Python virtual environment the Ansible collections are not installed due
to the order of execution of the script. On a machine that does not have
the 'containers.*' collection the test fails as there is no container
connector available.

This patch moves the section that installs Ansible collections to run
after the virtual environment is configured, and then install the
collections (usually, only 'containers.podman'), allowing the tests to
be executed.

utils/run-tests.sh

@@ -259,6 +259,10 @@ then
     log info "Installing Ansible: ${ANSIBLE_VERSION}"
     pip install --quiet "${ANSIBLE_VERSION}"
     log debug "Ansible version: $(ansible --version | sed -n "1p")${RST}"
+else
+   log info "Using current virtual environment."
+fi
+
 if [ -n "${ANSIBLE_COLLECTIONS}" ]
 then
     log warn "Installed collections will not be removed after execution."
@@ -266,9 +270,6 @@ then
     # shellcheck disable=SC2086
     quiet ansible-galaxy collection install ${ANSIBLE_COLLECTIONS} || die "Failed to install Ansible collections."
 fi
-else
-   log info "Using current virtual environment."
-fi
 
 # Ansible configuration
 export ANSIBLE_ROLES_PATH="${TOPDIR}/roles"