Overlay ignores user input when using standalone.xml.original as a firstrun indicator

If the user has already run overlay install.sh to set up Zanata, the script will recognise the subsequent runs due to the existence of standalone.xml.original.

Then when the user removes the standalone.xml to regenerate it, the standalone-zanata.xml is copied across without replacing the variables requested from the user (database schema/password, etc)

Removing the .original file causes the install.sh to work correctly.

• Build zanata

• cd zanata-overlay; gradle -q

• cd $JBOSS_HOME; unzip $path_to_build/zanata-overlay/target/zanata-$version.zip

• cd $JBOSS_HOME/bin/zanata-installer

• chmod +x install.sh; ./install.sh

• Enter values, leaving mysql password empty, until the $JBOSS_HOME/standalone/configuration/standalone.xml is created

• Delete $JBOSS_HOME/standalone/configuration/standalone.xml

• ./install.sh

• Enter different values for schema and a mysql password until .xml is created

Actual:
$JBOSS_HOME/standalone/configuration/standalone.xml has old value for schema, and no password

Expected:
The file was updated to reflect the changes