[CI] SamlRealmTests.testCreateSigningCredentialFromKeyStoreFailureScenarios failure

[astefan]

Build scan: https://gradle-enterprise.elastic.co/s/oaqn5q3yqffto

Repro line:

gradlew ':x-pack:plugin:security:unitTest' -Dtests.seed=650E90755FF7B650 -Dtests.class=org.elasticsearch.xpack.security.authc.saml.SamlRealmTests -Dtests.method="testCreateSigningCredentialFromKeyStoreFailureScenarios" -Dtests.security.manager=true -Dtests.locale=ar-LY -Dtests.timezone=America/Atka -Dcompiler.java=11 -Druntime.java=8

Reproduces locally?: no

Applicable branches: 6.8

Failure history:
https://build-stats.elastic.co/app/kibana#/discover?_g=(refreshInterval:(pause:!t,value:0),time:(from:now-30d,mode:quick,to:now))&_a=(columns:!(_source),index:b646ed00-7efc-11e8-bf69-63c8ef516157,interval:auto,query:(language:kuery,query:'testCreateSigningCredentialFromKeyStoreFailureScenarios%20AND%20build.branch%20:%20%226.8%22'),sort:!(process.time-start,desc))

Failure excerpt:

ERROR   0.03s J9  | SamlRealmTests.testCreateSigningCredentialFromKeyStoreFailureScenarios <<< FAILURES!
   > Throwable #1: java.security.KeyStoreException: Key protection  algorithm not found: java.security.UnrecoverableKeyException: Encrypt Private Key failed: unrecognized algorithm name: PBEWithSHA1AndDESede
   > 	at __randomizedtesting.SeedInfo.seed([650E90755FF7B650:13239521B5747733]:0)
   > 	at sun.security.pkcs12.PKCS12KeyStore.setKeyEntry(PKCS12KeyStore.java:677)
   > 	at sun.security.pkcs12.PKCS12KeyStore.engineSetKeyEntry(PKCS12KeyStore.java:577)
   > 	at java.security.KeyStore.setKeyEntry(KeyStore.java:1140)
   > 	at org.elasticsearch.xpack.security.authc.saml.SamlRealmTests.testCreateSigningCredentialFromKeyStoreFailureScenarios(SamlRealmTests.java:508)
   > 	at java.lang.Thread.run(Thread.java:748)
   > Caused by: java.security.UnrecoverableKeyException: Encrypt Private Key failed: unrecognized algorithm name: PBEWithSHA1AndDESede
   > 	at sun.security.pkcs12.PKCS12KeyStore.encryptPrivateKey(PKCS12KeyStore.java:921)
   > 	at sun.security.pkcs12.PKCS12KeyStore.setKeyEntry(PKCS12KeyStore.java:614)
   > 	... 40 more
   > Caused by: java.security.NoSuchAlgorithmException: unrecognized algorithm name: PBEWithSHA1AndDESede
   > 	at sun.security.x509.AlgorithmId.get(AlgorithmId.java:448)
   > 	at sun.security.pkcs12.PKCS12KeyStore.mapPBEAlgorithmToOID(PKCS12KeyStore.java:938)
   > 	at sun.security.pkcs12.PKCS12KeyStore.encryptPrivateKey(PKCS12KeyStore.java:895)
   > 	... 41 more

Similar/identic with #72639.

[elasticmachine]

Pinging @elastic/es-security (Team:Security)