Unify the name for branch and master in CI jenkinsfile (#359)

Co-authored-by: peng <[email protected]>

Author: cisco66666

test/conference.jenkinsfile

@@ -2,7 +2,7 @@ void setBuildStatus(String message, String state) {
     step([
         $class: "GitHubCommitStatusSetter",
         reposSource: [$class: "ManuallyEnteredRepositorySource", url: "${REPO_URL}/owt-client-javascript"],
-        contextSource: [$class: "ManuallyEnteredCommitContextSource", context: "ci/jenkins/conference43x"],
+        contextSource: [$class: "ManuallyEnteredCommitContextSource", context: "ci/jenkins/conference"],
         errorHandlers: [[$class: "ChangingBuildStatusErrorHandler", result: "UNSTABLE"]],
         statusResultSource: [$class: "ConditionalStatusResultSource", results: [[$class: "AnyBuildResult", message: message, state: state]]]
     ]);

test/ubuntuconference.jenkinsfile

@@ -2,7 +2,7 @@ void setBuildStatus(String message, String state) {
     step([
         $class: "GitHubCommitStatusSetter",
         reposSource: [$class: "ManuallyEnteredRepositorySource", url: "${REPO_URL}/owt-client-javascript"],
-        contextSource: [$class: "ManuallyEnteredCommitContextSource", context: "ci/jenkins/ubuntuconference43x"],
+        contextSource: [$class: "ManuallyEnteredCommitContextSource", context: "ci/jenkins/ubuntuconference"],
         errorHandlers: [[$class: "ChangingBuildStatusErrorHandler", result: "UNSTABLE"]],
         statusResultSource: [$class: "ConditionalStatusResultSource", results: [[$class: "AnyBuildResult", message: message, state: state]]]
     ]);