Implement automated tests for MAAS backup/restore

Related-PROD: PROD-32673
Change-Id: Iaa4e5e132cb709cb4133af158a3fa284280c9f79
diff --git a/tcp_tests/managers/saltmanager.py b/tcp_tests/managers/saltmanager.py
index 226f408..0ecef46 100644
--- a/tcp_tests/managers/saltmanager.py
+++ b/tcp_tests/managers/saltmanager.py
@@ -271,6 +271,14 @@
         result = self.local(tgt=tgt, fun='service.stop', args=service)
         return result['return']
 
+    def pkg_install(self, tgt, pkg):
+        result = self.local(tgt=tgt, fun='pkg.install', args=pkg)
+        return result['return']
+
+    def pkg_info_installed(self, tgt, pkg):
+        result = self.local(tgt=tgt, fun='pkg.info_installed', args=pkg)
+        return result['return']
+
     def cmd_run(self, tgt, cmd):
         result = self.local(tgt=tgt, fun='cmd.run', args=cmd)
         return result['return']