1.
    keystore created like this:

    keytool -genkey -keystore MicroEmulator.keystore -storepass PWD -keypass PWD -alias MicroEmulatorSignJars -dname "cn=MicroEmulator Team"

2.
    keystore should be stored in file ${home}/.m2/MicroEmulator.keystore for build to work

3.
    Your ${home}/.m2/settings.xml  should have password stored like this:

    <settings>
        ...
        <profiles>
        <profile>
            <id>default</id>
            <activation>
                <activeByDefault/>
            </activation>
            <properties>
                <MicroEmulator-keystore-pwd>PWD</MicroEmulator-keystore-pwd>
            </properties>
            .....
        </profiles>
        <activeProfiles>
            <activeProfile>default</activeProfile>
        </activeProfiles>
    </settings>