[7.1] Development Guide, Getting Started Guide: update content to match with EAP 7.1.0.DR13 and JBDS 10.3 in Get Started Developing Applications chapters

Book: Development Guide rev. 8280001, Getting Started Guide rev. 8279997

Issue description
JBoss EAP 7.x supports latest generally available JBoss Developer Studio release. As of JBoss EAP 7.1.0.DR13, latest generally available release of JBDS is 10.3.0.GA. This should be reflected in the documentation.