issue #528 - use UTC in DateTimeHandlerTest and ParameterExtractionTest

Now the DateTimeHandler are dependent on the current timezone of the
java runtime.  On our CI environment, it must be UTC.  Now we'll set UTC
as the default timezone at the beginning of these tests so they can pass
like they used to.

Signed-off-by: Lee Surprenant <lmsurpre@us.ibm.com>

Author: lmsurpre

fhir-persistence-jdbc/src/test/java/com/ibm/fhir/persistence/jdbc/test/util/ParameterExtractionTest.java

@@ -18,7 +18,9 @@
 import java.time.format.DateTimeFormatterBuilder;
 import java.time.temporal.ChronoField;
 import java.util.List;
+import java.util.TimeZone;
 
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
 import com.ibm.fhir.model.resource.SearchParameter;
@@ -99,6 +101,11 @@ public class ParameterExtractionTest {
     private static final SearchParameter stringSearchParam = searchParamBuilder.type(SearchParamType.STRING).build();
     private static final SearchParameter tokenSearchParam = searchParamBuilder.type(SearchParamType.TOKEN).build();
 
+    @BeforeClass
+    public void setSystemTimeZone() {
+        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
+    }
+    
     @Test
     public void testBoolean() throws FHIRPersistenceProcessorException {
         JDBCParameterBuildingVisitor parameterBuilder = new JDBCParameterBuildingVisitor(tokenSearchParam);

fhir-search/src/test/java/com/ibm/fhir/search/date/DateTimeHandlerTest.java

@@ -14,7 +14,9 @@
 import java.time.Instant;
 import java.time.temporal.ChronoField;
 import java.time.temporal.TemporalAccessor;
+import java.util.TimeZone;
 
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
 import com.ibm.fhir.model.type.DateTime;
@@ -23,6 +25,11 @@
 
 public class DateTimeHandlerTest {
 
+    @BeforeClass
+    public void setSystemTimeZone() {
+        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
+    }
+
     @Test
     public void testYearParser() throws FHIRSearchException {
         TemporalAccessor acc = DateTimeHandler.parse("2019");