RFR: 7486: Unable to install Eclipse IDE Plugin

[Virag Purnam]

**Issue:** Unable to install JMC supported Eclipse IDE Plugin. Some of the dependent plugins are missing. 

**Fix:** Added those dependent plugins in "ide feature" and also deleted one unused plugin from "flight recorder feature".

**Plugins added:**
"org.objectweb.asm",       
"org.objectweb.asm.commons",        
"org.objectweb.asm.tree",      
"org.objectweb.asm.util", 
"org.eclipse.jetty.webapp",        
"org.eclipse.jetty.security",         
"org.eclipse.jetty.server",        
"org.eclipse.jetty.alpn.client",        
"org.eclipse.jetty.servlet",              
"org.eclipse.jetty.http",       
"org.eclipse.jetty.io",       
"org.eclipse.jetty.util",        
"org.eclipse.jetty.xml",       
"org.eclipse.jetty.websocket.core.client",       
"org.eclipse.jetty.websocket.core.common",       
"org.eclipse.jetty.websocket.core.server",      
"org.eclipse.jetty.websocket.common",        
"org.eclipse.jetty.client"

**Plugin removed:**
"org.eclipse.jetty.websocket.javax.server"

-------------

Commit messages:
 - 7486: Unable to install Eclipse IDE Plugin

Changes: https://git.openjdk.java.net/jmc/pull/377/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=377&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7486
  Stats: 136 lines in 2 files changed: 128 ins; 7 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/377.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/377/head:pull/377

PR: https://git.openjdk.java.net/jmc/pull/377