Make it possible to increase the amount of memory assigned to the plaintext importer job

[marekhorst]

The cache_builder workflow responsible for rebuilding PMC ingester cache from scratch failed with the following error message:

Container [pid=22105,containerID=container_e78_1715771856403_155795_02_000001] is running beyond physical memory limits. Current usage: 1.1 GB of 1 GB physical memory used; 2.8 GB of 2.1 GB virtual memory used. Killing container.

Job name:

oozie:action:T=map-reduce:W=importer_plaintext:A=content-retriever:ID=0004585-241122080234071-oozie-oozi-W

indicates plaintext importer phase has failed.

This is kind of similar to other recently introduced fix, #953, and should be solved in a similar way by increasing the amount of memory assigned to this job.

We could start with doubling the default value so increasing it to 2g.