Remove exception guard for absent query handling.

We now no longer fall back to an absent query when a NamedQuery construction fails with IllegalArgumentException. IllegalArgumentException is also used by the JPA API to indicate an absent query. In other cases, where we fail with IllegalArgumentException, we fell back to query derivation as handling IAE as signal for an absent query.

We already have better query absence checks in place so we can remove the try/catch blocks in favor of the named query presence check.

Closes #3550

spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/query/NamedQuery.java

@@ -129,7 +129,7 @@ static boolean hasNamedQuery(EntityManager em, String queryName) {
 	@Nullable
 	public static RepositoryQuery lookupFrom(JpaQueryMethod method, EntityManager em) {
 
-		final String queryName = method.getNamedQueryName();
+		String queryName = method.getNamedQueryName();
 
 		if (LOG.isDebugEnabled()) {
 			LOG.debug(String.format("Looking up named query %s", queryName));
@@ -143,16 +143,11 @@ public static RepositoryQuery lookupFrom(JpaQueryMethod method, EntityManager em
 			throw QueryCreationException.create(method, "Scroll queries are not supported using String-based queries");
 		}
 
-		try {
-
-			RepositoryQuery query = new NamedQuery(method, em);
-			if (LOG.isDebugEnabled()) {
-				LOG.debug(String.format("Found named query %s", queryName));
-			}
-			return query;
-		} catch (IllegalArgumentException e) {
-			return null;
+		RepositoryQuery query = new NamedQuery(method, em);
+		if (LOG.isDebugEnabled()) {
+			LOG.debug(String.format("Found named query %s", queryName));
 		}
+		return query;
 	}
 
 	@Override