api-test: upload-rename-download file with back slash (#2239)

tests/acceptance/features/coreApiWebdavProperties/createFileFolder.feature

@@ -26,6 +26,7 @@ Feature: create files and folder
       | old              | "Sample,comma"   |
       | old              | "'single'"       |
       | old              | '"double"'       |
+      | old              | "with\backslash" |
       | new              | "upload"         |
       | new              | "strängé folder" |
       | new              | "C++ folder.cpp" |
@@ -38,6 +39,7 @@ Feature: create files and folder
       | new              | "'single'"       |
       | new              | '"double"'       |
       | new              | "नेपाली"         |
+      | new              | "with\backslash" |
       | spaces           | "upload"         |
       | spaces           | "strängé folder" |
       | spaces           | "C++ folder.cpp" |
@@ -49,6 +51,7 @@ Feature: create files and folder
       | spaces           | "Sample,comma"   |
       | spaces           | "'single'"       |
       | spaces           | '"double"'       |
+      | spaces           | "with\backslash" |
 
   @smokeTest
   Scenario Outline: get resourcetype property of a folder
@@ -122,7 +125,7 @@ Feature: create files and folder
       | new              |
       | spaces           |
 
-
+  @web-issue-1893
   Scenario Outline: create a file
     Given using <dav-path-version> DAV path
     When user "Alice" uploads file with content "some text" to <file-name> using the WebDAV API
@@ -142,6 +145,7 @@ Feature: create files and folder
       | old              | "Sample,comma.txt" |
       | old              | "'single'.txt"     |
       | old              | '"double".txt'     |
+      | old              | "with\backslash"   |
       | new              | "upload.txt"       |
       | new              | "strängéfile.txt"  |
       | new              | "C++ file.cpp"     |
@@ -153,6 +157,7 @@ Feature: create files and folder
       | new              | "Sample,comma.txt" |
       | new              | "'single'.txt"     |
       | new              | '"double".txt'     |
+      | new              | "with\backslash"   |
       | spaces           | "upload.txt"       |
       | spaces           | "strängéfile.txt"  |
       | spaces           | "C++ file.cpp"     |
@@ -164,6 +169,7 @@ Feature: create files and folder
       | spaces           | "Sample,comma.txt" |
       | spaces           | "'single'.txt"     |
       | spaces           | '"double".txt'     |
+      | spaces           | "with\backslash"   |
 
   @issue-10339 @issue-9568
   Scenario Outline: try to create file with '.', '..' and 'empty'