RANGER-5734: Update EmbeddedServer to use custom TrustStore

[vikaskr22]

What changes were proposed in this pull request?

embeddedwebserver/src/main/java/org/apache/ranger/server/tomcat/EmbeddedServer.java class reads and uses custom truststore and updates the defaultSSLContext.

But Ranger-Admin/KMS uses the connector approach and Tomcat's connector doesn't use the keyStore/TrustStore from the defaultContext. Here, code to set keyStore into Tomcat's connector is already available but similar code to set custom trustStore was missing. Hence , it was falling back to JVM's default cacerts.

As part of this PR, code has been added to use custom user provided trustStore.

How was this patch tested?

-mvn build has passed

• Existing UTs has passed
• Took patch, applied and deployed on internal cluster and verified if custom trustStore is being used or not. For this, I enabled mTLS between KMS & Admin by setting ranger.service.https.attrib.clientAuth=true and found it working.