Fix mftf tests

Author: VladimirZaets

app/code/Magento/Bundle/Test/Mftf/Test/StorefrontCustomerSearchBundleProductsByKeywordsTest.xml

@@ -39,7 +39,7 @@
                 <requiredEntity createDataKey="fixedBundleOption"/>
                 <requiredEntity createDataKey="createSimpleProductTwo"/>
             </createData>
-            <magentoCLI command="indexer:reindex" arguments="cataloginventory_stock catalogsearch_fulltext" stepKey="reindex"/>
+            <magentoCLI command="indexer:reindex" stepKey="reindex"/>
         </before>
         <after>
             <deleteData createDataKey="createDynamicBundle" stepKey="deleteDynamicBundleProduct"/>

dev/tests/static/testsuite/Magento/Test/Legacy/ModuleDBChangeTest.php

@@ -45,13 +45,17 @@ public static function setUpBeforeClass()
             } else {
                 //get current minor branch name
                 preg_match('|^(\d+\.\d+)|', $branchName, $minorBranch);
-                $branchName = $minorBranch[0];
+                if (isset($minorBranch[0])) {
+                    $branchName = $minorBranch[0];
 
-                //get all version branches
-                preg_match_all('|^(\d+\.\d+)|m', file_get_contents($branchesFile), $matches);
+                    //get all version branches
+                    preg_match_all('|^(\d+\.\d+)|m', file_get_contents($branchesFile), $matches);
 
-                //check is this a latest release branch
-                self::$actualBranch = ($branchName == max($matches[0]));
+                    //check is this a latest release branch
+                    self::$actualBranch = ($branchName == max($matches[0]));
+                } else {
+                    self::$actualBranch = true;
+                }
             }
         }