Support pkcs12 keystore type

[banterCZ]

Current ssl configuration supports only default keystore type, usually jks but may be different per JVM. Make it configurable to support pkcs12.

final KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());

https://github.com/wultra/lime-java-core/blob/develop/rest-client-base/src/main/java/com/wultra/core/rest/client/base/util/SslUtils.java#L81