Bypass openvswitch update logic if expected packages are not present

The nuage integration uses a different package name for openvswitch,
breaking the update steps. This patch bypasses the update logic if the
expected packages are not present allowing nuage deployments to manage
the openvswitch package some other other way.

Note:
    Due to path restructuring and file renaming, this is a semantic
    backport of https://review.opendev.org/#/c/702677/. This patch also
    includes similar modifications in the update_tasks for layered
    packaging on queens.
    Original commit: f907d061ba

Change-Id: I282b8b44db5b29b4b9a995b2f2938719ce04a077
Closes-Bug: #1858640

puppet/services/tripleo-packages.yaml

@@ -126,8 +126,17 @@ outputs:
         #     change with every major upgrade so this special handling will
         #     eventually replace the special handling of upgrading the
         #     openvswitch package "in place"
+        - name: Get current OpenvSwitch package name
+          register: ovs_pkg_out
+          shell:
+            rpm -qa | awk -F- '/^(openvswitch[0-9]+\.[0-9]+-|openvswitch-2)/{print $1}'
+        - name: Don't update if not present
+          set_fact:
+            run_ovs_update: "{{ (ovs_pkg_out.stdout | length) > 0 }}"
         - name: Block for gathering information for upgrading OpenvSwitch layered product packaging
-          when: step|int == 2
+          when:
+            - step|int == 2
+            - run_ovs_update|bool
           block:
             - name: Process rhosp-openvswitch layered package for new version number
               shell: |
@@ -142,11 +151,6 @@ outputs:
               set_fact:
                 new_ovs_version: "{{ rhosp_package_result.stdout }}"
               when: ovs_lp_packaging|default(false)
-
-            - name: Get current OpenvSwitch package name
-              register: ovs_pkg_out
-              shell:
-                rpm -qa | awk -F- '/^(openvswitch[0-9]+\.[0-9]+-|openvswitch-2)/{print $1}'
             - name: Get version from current OpenvSwitch package
               register: ovs_version_out
               shell:
@@ -188,7 +192,7 @@ outputs:
         - name: Check for openvswitch upgrade if not layered package installs
           when:
             - step|int == 2
-            - run_ovs_update|default(true)
+            - run_ovs_update|bool
           block:
             - name: check if an upgrade is required
               register: ovs_need_upgrade
@@ -228,7 +232,7 @@ outputs:
                 - "{{ovs_list_of_rpms.stdout_lines}}"
           when:
             - step|int == 2
-            - run_ovs_update|default(true)
+            - run_ovs_update|bool
             - ovs_packaging_issue|default(false)|succeeded
             - ovs_need_upgrade.stdout|default('')
         # The openvswitch package disables the systemd service on install. When installing
@@ -305,8 +309,17 @@ outputs:
         #     change with every major upgrade so this special handling will
         #     eventually replace the special handling of upgrading the
         #     openvswitch package "in place"
+        - name: Get current OpenvSwitch package name
+          register: ovs_pkg_out
+          shell:
+            rpm -qa | awk -F- '/^(openvswitch[0-9]+\.[0-9]+-|openvswitch-2)/{print $1}'
+        - name: Don't update if not present
+          set_fact:
+            run_ovs_update: "{{ (ovs_pkg_out.stdout | length) > 0 }}"
         - name: Block for gathering information for upgrading OpenvSwitch layered product packaging
-          when: step|int == 2
+          when:
+            - step|int == 2
+            - run_ovs_update|bool
           block:
             - name: Process rhosp-openvswitch layered package for new version number
               shell: |
@@ -321,11 +334,6 @@ outputs:
               set_fact:
                 new_ovs_version: "{{ rhosp_package_result.stdout }}"
               when: ovs_lp_packaging|default(false)
-
-            - name: Get current OpenvSwitch package name
-              register: ovs_pkg_out
-              shell:
-                rpm -qa | awk -F- '/^(openvswitch[0-9]+\.[0-9]+-|openvswitch-2)/{print $1}'
             - name: Get version from current OpenvSwitch package
               register: ovs_version_out
               shell: