tests: fix package and ca_cert cloud_tests on bionic

package_update_upgrade_install was failing as htop is now included in
Bionic images.  Switch this test to install 'sl' instead.

ca_certs integration test fails on cert_count test because bionic
update-ca-certificates on bionic generates less symlinks for a given cert.

Integration tests now collect dpkg-query --show output on every instance.
Add a new assertPackageInstalled helper method which finds the package or
package version installed on the instance.

Adapt existing byobu, package_update_upgrade_install, ntp and salt_minion
tests to use assertPackageInstalled method.

LP: #1769985

1 files changed, 2 insertions, 3 deletions

diff --git a/tests/cloud_tests/testcases/modules/ntp.py b/tests/cloud_tests/testcases/modules/ntp.py
index b50e52fe..c63cc15e 100644
--- a/tests/cloud_tests/testcases/modules/ntp.py
+++ b/tests/cloud_tests/testcases/modules/ntp.py
@@ -9,15 +9,14 @@ class TestNtp(base.CloudTestCase):
 
     def test_ntp_installed(self):
         """Test ntp installed"""
-        out = self.get_data_file('ntp_installed')
-        self.assertEqual(0, int(out))
+        self.assertPackageInstalled('ntp')
 
     def test_ntp_dist_entries(self):
         """Test dist config file is empty"""
         out = self.get_data_file('ntp_conf_dist_empty')
         self.assertEqual(0, int(out))
 
-    def test_ntp_entires(self):
+    def test_ntp_entries(self):
         """Test config entries"""
         out = self.get_data_file('ntp_conf_pool_list')
         self.assertIn('pool.ntp.org iburst', out)