NullPointerException with kie-config-cli.sh after migration from 6.1.0 to 6.1.2

Description of problem:

When you migrate from 6.1.0 to 6.1.2 (a.k.a. 6.1 Update 2), kie-config-cli.sh "add-group-repo" (and add-group-org-unit) throws NullPointerException against a repository which:

• was created in 6.1.0
  and
• has no role in "security:roles"

===============================
>>Please enter command (type help to see available commands):
list-repo
Result:
Currently available repositories:
Repository repository1
scheme: git
uri: git://repository1
environment:

{username=brmsAdmin, scheme=git, security:roles=[], origin=ssh://brmsAdmin@localhost:8001/repository1, password=****}

groups: []

>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>Please enter command (type help to see available commands):
add-group-repo
>>Repository alias:repository1
>>Security groups (comma separated list):role1
Unhandled exception caught while executing command add-group-repo error: null
java.lang.NullPointerException
at org.guvnor.structure.backend.repositories.RepositoryServiceImpl.addGroup(RepositoryServiceImpl.java:230)
at org.guvnor.structure.backend.repositories.RepositoryServiceImpl$Proxy$$$_WeldClientProxy.addGroup(RepositoryServiceImpl$Proxy$$$_WeldClientProxy.java)
at org.kie.config.cli.command.impl.AddGroupToRepositoryCliCommand.execute(AddGroupToRepositoryCliCommand.java:39)
at org.kie.config.cli.CmdMain.main(CmdMain.java:97)
================================

Steps to Reproduce:
1. Download attached niogit610.zip (pure '.niogit' after BRMS 6.1.0 boot)
2. Copy the '.niogit' directory to BRMS 6.1.2. (This step simulates that you apply the update patch 2 to 6.1.0)
3. Start BRMS 6.1.2
4. Run kie-config-cli.sh (Make sure that the update patch is also applied to supplementary-tools)
> add-group-repo
>>Repository alias:repository1
>>Security groups (comma separated list):role1

Actual results:

It throws NullPointerException

Expected results:

'role1' is added to repository1.