Added the --all option to journald and cleaned up wait groups

[jmwilliams89]

Description of Changes

• Added the --all flag to the journald operator. This will prevent entries exceeding 4096 bytes from being encoded as null.
• Corrected the wait group to be incremented outside of the goroutine to avoid race conditions.
• Removed superfluous call to the wait group in the polling function.

Please check that the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• Add a changelog entry (for non-trivial bug fixes / features)
• CI passes

[djaglowski]

Log Files	Logs / Second	CPU Avg (%)	CPU Avg Δ (%)	Memory Avg (MB)	Memory Avg Δ (MB)
1	1000	1.6379586	+0.2931447	128.74757	+1.1807632
1	5000	4.741427	-0.74136305	134.32126	-5.673218
1	10000	10.310347	-0.08634853	144.07866	-2.139557
1	50000	45.655136	-5.380577	173.9278	-3.2761383
1	100000	99.10428	-14.548264	230.9472	-16.017242
10	100	1.9482856	-0.034596443	134.28287	+1.6105957
10	500	5.5689564	-0.55186987	136.1409	-1.7766724
10	1000	13.379389	+1.292983	146.99771	-0.17012024
10	5000	57.031597	+3.6684532	180.3486	+1.2672424
10	10000	107.85927	-2.5794296	220.19882	-9.51265

[jsirianni]

Looks good and works well. I see this in my openshift agent's ps -aux output:

journalctl --utc --output=json --all --no-pager --directory /var/log/journal --after-cursor. . . . .

[codecov]

Codecov Report

Merging #414 (509bf35) into master (5fc3cd8) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #414      +/-   ##
==========================================
- Coverage   73.13%   73.08%   -0.05%     
==========================================
  Files         124      124              
  Lines        8095     8094       -1     
==========================================
- Hits         5920     5915       -5     
- Misses       1668     1673       +5     
+ Partials      507      506       -1     

Impacted Files	Coverage Δ
operator/builtin/input/journald/journald.go	60.58% <100.00%> (-0.29%)	⬇️
operator/builtin/input/file/file.go	77.04% <0.00%> (-1.53%)	⬇️
operator/builtin/output/newrelic/newrelic.go	73.55% <0.00%> (-0.83%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5fc3cd8...509bf35. Read the comment docs.