Remove duplicate attributes in sample files

Some of the sample files have duplicate
attributes in sample files.

Those did not cause failure as tests load json
sample file as dict and duplicate values gets merged.

This patch fix duplicate entry.

Functional sample file left while fixing the same on
doc sample - I7cd969fb4c9d4bff995c34725cfb739cccaba12c

Change-Id: I3fa0411e0a3f17020389911d5a16bcd247870839

nova/tests/functional/api_sample_tests/api_samples/os-rescue/server-get-resp-unrescue.json.tpl

@@ -65,7 +65,6 @@
         "os-extended-volumes:volumes_attached": [],
         "OS-SRV-USG:launched_at": "%(strtime)s",
         "OS-SRV-USG:terminated_at": null,
-        "progress": 0,
         "security_groups": [
             {
                 "name": "default"

nova/tests/functional/api_sample_tests/api_samples/os-server-tags/v2.26/server-tags-show-details-resp.json.tpl

@@ -75,7 +75,6 @@
         "os-extended-volumes:volumes_attached": [],
         "OS-SRV-USG:launched_at": "%(strtime)s",
         "OS-SRV-USG:terminated_at": null,
-        "progress": 0,
         "security_groups": [
             {
                 "name": "default"

nova/tests/functional/api_sample_tests/api_samples/os-server-tags/v2.26/servers-tags-details-resp.json.tpl

@@ -76,7 +76,6 @@
             "os-extended-volumes:volumes_attached": [],
             "OS-SRV-USG:launched_at": "%(strtime)s",
             "OS-SRV-USG:terminated_at": null,
-            "progress": 0,
             "security_groups": [
                 {
                     "name": "default"