Expand command names in pgrep

[mdelapenya]

There is a limit of 16 bytes the process name in Linux, which causes that the "elastic-endpoint" process name is not found when getting the running processes inside the linux container using pgrep.

fish-shell/fish-shell#4132 (comment)

It's possible to bypass this issue adding -f to pgrep, so that it maches the name with the full process name.

[mdelapenya]

Found useful information here:

• Process name is limitated to 15 chars in Linux beats#428