systemd service config is not setting recommended ulimit settings

[pg1671]

From https://docs.mongodb.com/manual/reference/ulimit/

Would be good to be able to set these as attribute in the cookbook.

(file size)

LimitFSIZE=infinity

(cpu time)

LimitCPU=infinity

(virtual memory size)

LimitAS=infinity

(open files)

LimitNOFILE=64000

(processes/threads)

LimitNPROC=64000

[apanagiotou]

+1