v5.0.0a5

[integration]

FIX: (#614) Show Submitting instead of Submitted in the Transformation Monitor
FIX: (#613) Set Content-Type when returning JSON encoded responses
Updates and optimisations due to proposed changes to BaseRequestHandler, see DIRACGrid/DIRAC#5399
Changes tested on lbcertifdiracoauth.cern.ch.
CHANGE: (#610) Updates and optimisations due to proposed changes to BaseRequestHandler
FIX: (#608) align args of the updateSoftware method