Can't run micro integrator from master > FATAL Error While performing config changes

[marcgarciajr]

Description:
I can't run the micro integration with the image built from master branch.

% pwd
˜/git/docker-ei/dockerfiles/alpine/micro-integrator

$ docker build -t wso2mi:1.1.0 .

$ docker run -p 8253:8253 -p 8290:8290 wso2mi:1.1.0

Error obtained:

FATAL {org.wso2.micro.integrator.server.Main} - Error while performing configuration changes
org.wso2.config.mapper.ConfigParserException: Error while creating new directory /home/wso2carbon/wso2mi-1.1.0/backup/conf/passthru-http.properties
at org.wso2.config.mapper.util.FileUtils.writeFile(FileUtils.java:74) ~[config-mapper-1.0.3.jar:1.0.3]
at org.wso2.config.mapper.util.FileUtils.writeDirectory(FileUtils.java:101) ~[config-mapper-1.0.3.jar:1.0.3]