enable ssl security

[roufa85]

@nbogojevic please review this PR after #29
Thanks!

[codecov-io]

Codecov Report

Merging #28 into master will increase coverage by 19.85%.
The diff coverage is 83.33%.

@@              Coverage Diff              @@
##             master      #28       +/-   ##
=============================================
+ Coverage     58.34%   78.19%   +19.85%     
- Complexity      211      218        +7     
=============================================
  Files            30       27        -3     
  Lines          1037      798      -239     
  Branches         55       37       -18     
=============================================
+ Hits            605      624       +19     
+ Misses          405      148      -257     
+ Partials         27       26        -1

Impacted Files	Coverage Δ	Complexity Δ
...java/nb/kafka/operator/TopicCreationException.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...main/java/nb/kafka/operator/util/MeterManager.java	95.83% <ø> (+16.52%)	10 <0> (ø)	⬇️
...main/java/nb/kafka/operator/util/PropertyUtil.java	74% <ø> (+2.84%)	23 <0> (-1)	⬇️
...rc/main/java/nb/kafka/operator/KafkaAdminImpl.java	79.54% <0%> (-5.83%)	11 <0> (ø)
src/main/java/nb/kafka/operator/Main.java	59.32% <100%> (+2.95%)	3 <0> (ø)	⬇️
src/main/java/nb/kafka/operator/AppConfig.java	99.08% <100%> (+0.14%)	46 <10> (+8)	⬆️
...n/java/nb/kafka/operator/importer/CrdImporter.java
src/main/java/nb/kafka/operator/AclManager.java
.../java/nb/kafka/operator/watch/TopicCrdWatcher.java

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