CI: tls_bad_alpn AuTest is failing on master builds

[bneradt]

Starting a couple days ago (June 29), the tls_bad_alpn test has started failing on master. Here's a link to one of the failed jobs:
https://ci.trafficserver.apache.org/job/autest-master/793/console

The test is failing because a process, running the openssl command, doesn't have the expected output saying ALPN wasn't negotiated:

   Run: alpn banana: Failed
     Test : Checking that True == _isRunningAfter - Passed
        Reason: Returned Value: True == _isRunningAfter
     Starting TestRun 0-tr : No Issues found - Passed
        Reason: Started!
     Process: Default: Failed
       Test : Checking that ReturnCode == 1 - Passed
          Reason: Returned Value: 1 == 1
       file /var/tmp/ausb-master.793/tls_bad_alpn/_output/0-tr-Default/stream.all.txt : Banana should not match a negotiation - Failed
          Reason: Contents of /var/tmp/ausb-master.793/tls_bad_alpn/_output/0-tr-Default/stream.all.txt did not contains expression: "No ALPN negotiated"

Looking at the sandbox for that AuTest process, here is the command that process is trying to run:

https://ci.trafficserver.apache.org/autest/ausb-master.793/tls_bad_alpn/_output/0-tr-Default/

Command= openssl s_client -ign_eof -alpn=banana -connect 127.0.0.1:61103

That fails with:
https://ci.trafficserver.apache.org/autest/ausb-master.793/tls_bad_alpn/_output/0-tr-Default/stream.all.txt

unknown option -alpn=banana
usage: s_client args
...

[bneradt]

This is not a problem with the new CI: the CentOS images used for the new CI has a version of openssl that supports the -alpn option. I suggest we address this by adding an openssl feature skip check to the tls_bad_alpn.test.py test (something good to have regardless) and wait for CI test coverage until we move to the new CI, which should be soon.

[bneradt]

This will only fail the master autest Jenkins runs, not the PR autest runs. For our PR autest runs, we set our PATH such that the openssl-quic version of openssl is run:

export LD_LIBRARY_PATH=/opt/openssl-quic/lib
PATH=/opt/openssl-quic/bin:$PATH

Because of this, the PR runs use a version of openssl that supports -alpn and the test runs fine there. The master autest runs, however, run the system's openssl version, which is too old to support -alpn.