Ensure selected_macros is a list.
Ensure selected_macros is a list.

This fixes when only one macro is selected it is given as a string and splitting it results in one letter per job which breaks.

	modified:   src/python/services/RequestsDB.py

alexanderrichards/LZProduction,alexanderrichards/LZProduction,alexanderrichards/LZProduction,alexanderrichards/LZProduction