[skip ci] Disable cron on 0.10.0 (#2555)

* enable cron test on 0.10.0
Signed-off-by: Nzw <zw@milvus.io>

* fix merge result
Signed-off-by: Nshengjun.li <shengjun.li@zilliz.com>

* import test_during_creating_index_restart
Signed-off-by: Nzw <zw@milvus.io>

* disable restart case
Signed-off-by: Nzw <zw@milvus.io>

* [skip ci] Disable cron on 0.10.0
Signed-off-by: Nzw <zw@milvus.io>
Co-authored-by: Nzw <zw@milvus.io>
Co-authored-by: Nshengjun.li <shengjun.li@zilliz.com>

ci/jenkins/Jenkinsfile

 #!/usr/bin/env groovy
 
 String cron_timezone = "TZ=Asia/Shanghai"
-String cron_string = BRANCH_NAME == "0.10.0" ? "38 0 * * * " : ""
+String cron_string = BRANCH_NAME == "master" ? "38 0 * * * " : ""
 
 pipeline {
     agent none