Checkstyle rule adjustments for tests

Author: ORybak5

service/checkstyle/suppressions.xml

@@ -6,4 +6,5 @@
 
 <suppressions>
     <suppress files=".*\.java" checks="HideUtilityClassConstructorCheck"/>
+    <suppress files=".*Test\.java" checks="MethodLength"/>
 </suppressions>

service/src/test/java/uk/nhs/adaptors/gp2gp/utils/OperationOutcomeIssueTypeDeserializerTest.java

@@ -4,8 +4,6 @@
 import com.fasterxml.jackson.databind.module.SimpleModule;
 import org.hl7.fhir.dstu3.model.OperationOutcome;
 import org.junit.jupiter.api.Test;
-
-import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType;
 import static org.junit.jupiter.api.Assertions.assertEquals;