refactor: implement agreed upon changes based on discussion (#266)

[ata-nas]

Description:

Implement agreed upon changes from discussion #266

Related issue(s):

Fixes #305

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

---

• create new class MathUtilities
• implement proposed change to create isPowerOfTwo(int) boolean check inside MathUtilities
• create new class Preconditions
• implement proposed change to create requirePowerOfTwo(int) strict precondition inside Preconditions
• implement proposed change to create isBlank(String) boolean check inside StringUtilities
• implement proposed change to move StringUtilities#requireNotBlank(String) to Preconditions
• integrate the new changes for the MathUtilities into the respective places

[georgi-l95]

LG

[mattp-swirldslabs]

Looks pretty good. Please remove all the exclamation points from the exception message strings.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.05%. Comparing base (401b645) to head (93c2c06).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #336      +/-   ##
============================================
+ Coverage     93.98%   94.05%   +0.07%     
- Complexity      288      300      +12     
============================================
  Files            66       68       +2     
  Lines          1163     1177      +14     
  Branches         83       82       -1     
============================================
+ Hits           1093     1107      +14     
  Misses           57       57              
  Partials         13       13              

Files with missing lines	Coverage Δ
...a/com/hedera/block/common/utils/FileUtilities.java	100.00% <100.00%> (ø)
...a/com/hedera/block/common/utils/MathUtilities.java	100.00% <100.00%> (ø)
...a/com/hedera/block/common/utils/Preconditions.java	100.00% <100.00%> (ø)
...com/hedera/block/common/utils/StringUtilities.java	100.00% <100.00%> (ø)
...m/hedera/block/server/mediator/MediatorConfig.java	100.00% <100.00%> (ø)
...m/hedera/block/server/notifier/NotifierConfig.java	100.00% <100.00%> (ø)