Load holdings Testing Q4

This story is aimed to verify that load holding process is stable before the Q4 release.

Requirements:

setup a separate environment for the testing purpose (existing Vagrant boxes can be used) and perform several runs with following conditions:

• more than one tenant is created
• more than one credentials available for tenant
• XX:+HeapDumpOnOutOfMemoryError is added 

Proposed setup(s):

1. one tenant and several credentials(3-5)
2. two tenants with several credentials(3-5) for each tenant

Acceptance criteria:

• logs for run are attached
• environment info(JDK version, memory, etc.)

Additional information:

In the previous releases 'mod-kb-ebsco-java' module had several issues during the loading process and one of them is MODKBEKBJ-528.