RFR: 7360: Provider Name missing for Agent Plugin

[Guru Hb]

Configuration fix 
1. Added Bundle-vendor name 
2. Corrected the license header 
3. updated missing configuration parameters in feature.xml

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Commit messages:
 - 7360: Provider Name missing for Agent Plugin

Changes: https://git.openjdk.java.net/jmc/pull/292/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=292&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7360
  Stats: 125 lines in 8 files changed: 113 ins; 0 del; 12 mod
  Patch: https://git.openjdk.java.net/jmc/pull/292.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/292/head:pull/292

PR: https://git.openjdk.java.net/jmc/pull/292