fix: added default parameters for cancel pr pipeline (sonic-net#23281)

Signed-off-by: Austin Pham <[email protected]>

Author: auspham

.azure-pipelines/cancel-previous-elastictest-testplan.yml

@@ -1,3 +1,10 @@
+parameters:
+  - name: MGMT_URL
+    type: string
+    default: "https://raw.githubusercontent.com/sonic-net/sonic-mgmt"
+  - name: MGMT_BRANCH
+    type: string
+    default: ""
 steps:
   - ${{ if not(contains(variables['BUILD.REPOSITORY.NAME'], 'sonic-mgmt')) }}:
       - script: |

.azure-pipelines/pr_test_template.yml

@@ -89,6 +89,8 @@ jobs:
     timeoutInMinutes: 10
     steps:
       - template: cancel-previous-elastictest-testplan.yml
+        parameters:
+          MGMT_BRANCH: $(BUILD_BRANCH)
 
   - job: impacted_area_t0_elastictest
     displayName: "impacted-area-kvmtest-t0 by Elastictest"