postConfigure: Entered System name has not been saved on single server installation

System name I entered during postConfigure has not been saved.

Steps:

1. Download and unpack "mariadb-columnstore-1.1.5-1-centos7.x86_64.rpm.tar.gz".

2. Install CS by root:
rpm -ivh mariadb-columnstore*.rpm

3. Run "/usr/local/mariadb/columnstore/bin/postConfigure".

4. Select 1 for the type of System Server install.

5. For the System Name value enter "HappyMariaCS3".

6. "Select the type of Data Storage [1=internal, 2=external] (1) >" 1.

7. "Enter the list (Nx,Ny,Nz) or range (Nx-Nz) of DBRoot IDs assigned to module 'pm1' (1) >" 1.

8. Run "mcsadmin getsystemstatus".

Actual result:
"mcsadmin getsystemstatus" output is:
"getsystemstatus Wed Jul 25 16:33:11 2018

System columnstore-1"

Expected result:
"mcsadmin getsystemstatus" output is:
"getsystemstatus Wed Jul 25 16:33:11 2018

System HappyMariaCS3"