AMBARI-3743. YARN dynamic configs generate 0 values nodes. (srimanth)
AMBARI-3710. Can't tell repo error when collapsed in wizard step 1(xiwang)
AMBARI-3720. Provide read-only view of repo options in Ambari Web
AMBARI-3730. Create user 'Settings' option on user dropdown menu.(xiwang)
AMBARI-3733. Register Host: need to check host OS type if specific os group been selected at Advanced Repo in step1 .(xiwang)
AMBARI-3740. Host filters UI cleanup. (xiwang)