Merge branch '331-reduce-number-of-connections-in-the-pool' into 'master'

Resolve "reduce number of connections in the pool"

Closes #331

See merge request piotr.gawron/minerva!219
1 job for 332-public-data-overlays-are-not-accessible-via-api in 1 minute and 4 seconds
Status Name Job ID Coverage
  Test
passed test_frontend #21265

00:01:04