Add packetbeat namespace to a couple of topics missed in PR #1490

[dedemorton]

PR #1490 missed a couple of topics that show config examples.

Relates to #1417

[codecov-io]

Current coverage is 55.27%

Merging #1519 into master will decrease coverage by -0.25%

@@             master      #1519   diff @@
==========================================
  Files           197        174     -23   
  Lines         22280      20395   -1885   
  Methods           0          0           
  Messages          0          0           
  Branches          0          0           
==========================================
- Hits          12375      11272   -1103   
+ Misses         9517       8226   -1291   
- Partials        388        897    +509   

1. 5 files (not in diff) in topbeat/system were modified. more
   • Misses +2
   • Partials +2
   • Hits -4
2. 2 files (not in diff) in ...etbeat/protos/thrift were modified. more
   • Partials +53
   • Hits -53
3. 2 files (not in diff) in ...ketbeat/protos/pgsql were modified. more
   • Partials +48
   • Hits -48
4. 2 files (not in diff) in ...tbeat/protos/mongodb were modified. more
   • Partials +30
   • Hits -30
5. 5 files (not in diff) in ...beat/protos/memcache were modified. more
   • Partials +52
   • Hits -52
6. 2 files (not in diff) in ...cketbeat/protos/http were modified. more
   • Partials +77
   • Hits -77
7. 4 files (not in diff) in ...acketbeat/protos/dns were modified. more
   • Partials +30
   • Hits -30
8. 4 files (not in diff) in ...cketbeat/protos/amqp were modified. more
   • Partials +78
   • Hits -78
9. 5 files (not in diff) in packetbeat/protos were modified. more
   • Partials +75
   • Hits -75
10. 6 files (not in diff) in packetbeat/flows were modified. more
    • Partials +33
    • Hits -33

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