Bug fix for username in interactive installer

src/freedombone

@@ -652,6 +652,7 @@ fi
 
 function parse_args {
   if [[ $NO_OF_ARGS == 0 ]]; then
+      echo 'no_of_args = 0'
       show_help
       exit 0
   fi
@@ -660,11 +661,13 @@ function parse_args {
       echo "There is no user '$MY_USERNAME' on the system. Use 'adduser $MY_USERNAME' to create the user."
       exit 1
   fi
-  if [ ! $DOMAIN_NAME ]; then
+  if [ ! "$DOMAIN_NAME" ]; then
+      echo 'No default domain specified'
       show_help
       exit 2
   fi
   if [ ! $MY_USERNAME ]; then
+      echo 'No username specified'
       show_help
       exit 3
   fi
@@ -694,6 +697,9 @@ function read_configuration {
   fi
 
   if [ -f $CONFIGURATION_FILE ]; then
+      if grep -q "MY_USERNAME" $CONFIGURATION_FILE; then
+          MY_USERNAME=$(grep "MY_USERNAME" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
+      fi
       if grep -q "DOMAIN_NAME" $CONFIGURATION_FILE; then
           DOMAIN_NAME=$(grep "DOMAIN_NAME" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi