Netty max open connections test

[mrsaldana]

• I have considered the risk of behavior change or other zero migration impact (https://github.com/OpenLiberty/open-liberty/wiki/Behavior-Changes).
• If this PR fixes an Issue, the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN" (verify release bug label if applicable: https://github.com/OpenLiberty/open-liberty/wiki/Open-Liberty-Conventions).
• If this PR resolves an external Known Issue (including APARS), the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN".

Added missing message for chain initialization errors:

4/14/25, 17:02:10:142 EDT] 00000050 NettyFramewor E   CWWKO0029E: An exception was generated  when initializing chain defaultHttpEndpoint because of exception io.openliberty.netty.internal.exception.NettyException: A TCP Channel has been constructed with incorrect configuration property value, Channel Name: defaultHttpEndpoint name: maxOpenConnections value: -1 minimum Value: 1 maximum Value: 1280000
[4/14/25, 17:02:10:171 EDT] 00000050 IncidentImpl  I   FFDC1015I: An FFDC Incident has been created: "io.openliberty.netty.internal.exception.NettyException: A TCP Channel has been constructed with incorrect configuration property value, Channel Name: defaultHttpEndpoint name: maxOpenConnections value: -1 minimum Value: 1 maximum Value: 1280000 com.ibm.ws.http.netty.NettyChain 244" at ffdc_25.04.14_17.02.10.2.log