CredentialStore is not able to get data from credential storage in file on IBM JDK 8

CredentialStore is not able to get data from credential storage in file on IBM JDK 8

Related feature was added as a part of ELY-1879

Reproducer:

• Run CredentialStoreCommandTest test with IBM JDK 8
  • Use JDK11, set IBM-JDK8 path to mvn property:

    git clone git@github.com:wildfly-security/wildfly-elytron.git .
    cd tool
    mvn test -Dmaven.main.skip=true -B -fae -Dmaven.test.failure.ignore=true -P skip-default-tests -Djava8.home=$PATH_TO_IBM_JDK_8_HOME -Denforcer.skip=true -Dtest=CredentialStoreCommandTest
    

• 5 tests fails
  • testImportPKCSKeyPairFromFile
  • testGenerateKeyPairECDSA
  • testImportOpenSSHKeyPairFromString
  • testImportOpenSSHKeyPairFromFile
  • testImportPKCSKeyPairFromString