Remove -j from lgtm build (#6274)
Remove -j from lgtm build (#6274)

The lgtm build seems to be hanging some times for an hour or two, which can then lead to the build timing out when it keeps going. Removing the -j option thinking this might be causing resource contention with the builds. Have done a successful test build using this config
vmamidi/trafficserver,bryancall/trafficserver,pbchou/trafficserver,bryancall/trafficserver,duke8253/trafficserver,bryancall/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,pbchou/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,pbchou/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,bryancall/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver