Reduce open project resource consuming

[dadiorchen]

According to k8s top:

NAME                          CPU(cores)   MEMORY(bytes)
openproject-76bbff994-fmq9b   6m           1476Mi
NAME                                  CPU(cores)   MEMORY(bytes)

It consumes too much mem, we need to optimize the open project settings.

[sanketnadkarni]

@dadiorchen could you assign this to me, I cannot assign it on my own

[sanketnadkarni]

@salehmajeed