Increase func testing for ubuntu-minimal element

Since we still run these 3 version of ubuntu-minimal elements in
openstack-infra, also run functional testing for them.

Trusty and xenial will be in voting gate, precise added as skipped for
non-voting.

Add the default skip/run status to the "-l" output just to confirm
this too.

Change-Id: Icfbfd0cb7d9acae824972474b77e2fe0486c4f69
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

elements/ubuntu-minimal/test-elements/precise-build-succeeds/environment.d/10-set-distro.bash

@@ -0,0 +1 @@
+export DIB_RELEASE=precise

elements/ubuntu-minimal/test-elements/trusty-build-succeeds/README.rst

@@ -0,0 +1 @@
+Verify we can build a ubuntu-minimal image.

elements/ubuntu-minimal/test-elements/trusty-build-succeeds/environment.d/10-set-distro.bash

@@ -0,0 +1 @@
+export DIB_RELEASE=trusty

elements/ubuntu-minimal/test-elements/xenial-build-succeeds/README.rst

@@ -0,0 +1 @@
+Verify we can build a ubuntu-minimal image.

elements/ubuntu-minimal/test-elements/xenial-build-succeeds/environment.d/10-set-distro.bash

@@ -0,0 +1 @@
+export DIB_RELEASE=xenial

tests/run_functests.sh

@@ -19,6 +19,7 @@ DEFAULT_SKIP_TESTS=(
     # in non-voting
     gentoo/build-succeeds
     opensuse/build-succeeds
+    ubuntu-minimal/precise-build-succeeds
     # good to have the test case around - but because of changes
     # in testing does not work always.
     debian-minimal/testing-build-succeeds
@@ -194,7 +195,12 @@ while getopts ":hlj:t" opt; do
             echo "The available functional tests are:"
             echo
             for t in ${TESTS[@]}; do
-                echo "  $t"
+                echo -n "  $t"
+                if [[ " ${DEFAULT_SKIP_TESTS[@]} " =~ " ${t} " ]]; then
+                    echo " [skip]"
+                else
+                    echo " [run]"
+                fi
             done
             echo
             exit 0