Correct Apdex on transaction event if an error is present

[jtduffy]

Overview

This fix will properly assign an apdex of Frustrating if an non-ignored and unexpected error is present on the transaction. This mirrors the behavior of the WebRequestDispatcher when reporting Apdex metrics on a transaction.

Related Github Issue

Resolves #2104

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.57%. Comparing base (0704419) to head (24dcc36).

Files with missing lines	Patch %	Lines
.../main/java/com/newrelic/agent/TransactionData.java	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2191      +/-   ##
============================================
- Coverage     70.58%   70.57%   -0.01%     
- Complexity     9972     9973       +1     
============================================
  Files           842      842              
  Lines         40363    40367       +4     
  Branches       6116     6117       +1     
============================================
  Hits          28490    28490              
+ Misses         9099     9097       -2     
- Partials       2774     2780       +6     

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