Let API tests run without report_portal_integration, using dynamic loading

Let API tests run without report_portal_integration, using dynamic loading

- Removed @Step annotations, as pointcut is hardcoded in com.att->
  .automation.common.report_portal_integration.aspects.StepAspects

- Introduced ReportPortalListenerDelegator that loads com.att->
  .automation.common.report_portal_integration if available

- Optimized and organized dependencies

- Upgrade maven-assembly-plugin to resolve "Java heap space" error.

Issue-ID: VID-378

Change-Id: Iaf9279a48a1474d0ef6d0f514259dd383f6f5dbf
Signed-off-by: Ittay Stern <ittay.stern@att.com>