Don't use double quotes in MySQL queries

MySQL databases with the ANSI_QUOTES mode enabled treat " as an identifier
quote (see https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_ansi_quotes).
So for such databases the 'occ upgrade' fails with an error message like this:
... unknown column 'oc_*' in where clause.

This fix replaces the doulbe quotes with single quotes that should be always
used in MySQL queries to quote literal strings.

Signed-off-by: Robin Müller <robin.mueller@1und1.de>

lib/private/Repair/Collation.php

@@ -6,6 +6,7 @@
  * @author Morris Jobke <hey@morrisjobke.de>
  * @author Robin Appelman <robin@icewind.nl>
  * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Robin Müller <robin.mueller@1und1.de>
  *
  * @license AGPL-3.0
  *
@@ -124,7 +125,7 @@ protected function getAllNonUTF8BinTables(IDBConnection $connection) {
 			"	FROM INFORMATION_SCHEMA . COLUMNS" .
 			"	WHERE TABLE_SCHEMA = ?" .
 			"	AND (COLLATION_NAME <> '" . $characterSet . "_bin' OR CHARACTER_SET_NAME <> '" . $characterSet . "')" .
-			"	AND TABLE_NAME LIKE \"*PREFIX*%\"",
+			"	AND TABLE_NAME LIKE '*PREFIX*%'",
 			array($dbName)
 		);
 		$rows = $statement->fetchAll();
@@ -139,7 +140,7 @@ protected function getAllNonUTF8BinTables(IDBConnection $connection) {
 			"	FROM INFORMATION_SCHEMA . TABLES" .
 			"	WHERE TABLE_SCHEMA = ?" .
 			"	AND TABLE_COLLATION <> '" . $characterSet . "_bin'" .
-			"	AND TABLE_NAME LIKE \"*PREFIX*%\"",
+			"	AND TABLE_NAME LIKE '*PREFIX*%'",
 			[$dbName]
 		);
 		$rows = $statement->fetchAll();

tests/lib/Repair/RepairCollationTest.php

@@ -70,6 +70,7 @@ protected function setUp() {
 
 		$dbPrefix = $this->config->getSystemValue("dbtableprefix");
 		$this->tableName = $this->getUniqueID($dbPrefix . "_collation_test");
+		$this->connection->exec("SET SESSION sql_mode = CONCAT(@@SESSION.sql_mode, ',ANSI_QUOTES')");
 		$this->connection->exec("CREATE TABLE $this->tableName(text VARCHAR(16)) COLLATE utf8_unicode_ci");
 
 		$this->repair = new TestCollationRepair($this->config, $this->logger, $this->connection, false);