Fix case sensitivity of system database name

cypher-shell/src/integration-test/java/org/neo4j/shell/commands/CypherShellMultiDatabaseIntegrationTest.java

@@ -60,6 +60,14 @@ public void switchingToSystemDatabaseWorks() throws CommandException {
         assertOnSystemDB();
     }
 
+    @Test
+    public void switchingToSystemDatabaseIsNotCaseSensitive() throws CommandException {
+        useCommand.execute("SyStEm");
+
+        assertThat(linePrinter.output(), is(""));
+        assertOnSystemDB();
+    }
+
     @Test
     public void switchingToSystemDatabaseAndBackToNeo4jWorks() throws CommandException {
         useCommand.execute(SYSTEM_DB_NAME);
@@ -100,7 +108,7 @@ public void switchingDatabaseAfterRollbackTransactionWorks() throws CommandExcep
     @Test
     public void switchingToNonExistingDatabaseShouldGiveErrorResponseFromServer() throws CommandException {
         thrown.expect(ClientException.class);
-        thrown.expectMessage("The database requested does not exist.");
+        thrown.expectMessage("Database does not exist");
 
         useCommand.execute("this_database_name_does_not_exist_in_test_container");
     }

cypher-shell/src/main/java/org/neo4j/shell/state/BoltStateHandler.java

@@ -162,7 +162,7 @@ private void reconnect(boolean keepBookmark) {
         };
         session = driver.session(sessionArgs.andThen(sessionOptionalArgs));
 
-        String query = activeDatabaseNameAsSetByUser.equals(SYSTEM_DB_NAME) ? "SHOW DATABASES" : "RETURN 1";
+        String query = activeDatabaseNameAsSetByUser.compareToIgnoreCase(SYSTEM_DB_NAME) == 0 ? "SHOW DATABASES" : "RETURN 1";
 
         resetActualDbName(); // Set this to null first in case run throws an exception
         StatementResult run = session.run(query);