[#9876] Unified naming convention

[smilu97]

Fixed flink not able to start-up because of bean name mismatching problem

Bootstrap.java

flinkConfiguration = applicationContext.getBean("flinkConfiguration", FlinkConfiguration.class);

<bean id="flinkProperties" class="com.navercorp.pinpoint.flink.config.FlinkConfiguration"/>

[codecov]

Codecov Report

Merging #9891 (e60035a) into master (5d2e5f6) will increase coverage by 0.00%.
The diff coverage is 15.38%.

@@            Coverage Diff            @@
##             master    #9891   +/-   ##
=========================================
  Coverage     38.79%   38.79%           
- Complexity    11908    11910    +2     
=========================================
  Files          3538     3538           
  Lines         94167    94168    +1     
  Branches      10495    10495           
=========================================
+ Hits          36533    36534    +1     
- Misses        54459    54461    +2     
+ Partials       3175     3173    -2     

Impacted Files	Coverage Δ
...n/java/com/navercorp/pinpoint/flink/Bootstrap.java	0.00% <0.00%> (ø)
...rp/pinpoint/flink/cluster/FlinkServerRegister.java	0.00% <0.00%> (ø)
...vercorp/pinpoint/flink/config/FlinkProperties.java	36.36% <100.00%> (ø)

... and 7 files with indirect coverage changes

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