#161 Test user import with no parameters

Add test when user import is done with no parameters given in the csv
file.

integrationTests/cypress/e2e/import_empty_parameters.feature

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+Feature: Tests for inspecting the result details of an user import
+
+ Background:
+     Given the user "manager" exists
+     And the user "manager" is member of the group "cesManager"
+     And the user "manager" with password "newuserpassword1234A$" is logged in
+
+   Scenario: a user selects a file for upload
+     When the user opens the user import page
+     And the user selects the file "userimport_keineParameter.csv"
+     Then a table of the file content for the file "userimport_keineParameter.csv" is displayed
+
+   @clean_before
+   @clear_downloadDir
+   Scenario: a user uploads a file
+     When the user opens the user import page
+     And the user uploads the file "userimport_keineParameter.csv"
+     Then the user import page shows an import with the message "Import failed!" and the details "Skipped data rows (7)"
+
+   Scenario: after uploading a file a user inspects the user import details page about the skipped accounts
+       When the user opens the user import details page
+       And the user clicks on the details regarding the "skipped" user import
+       Then the table shows the error message "<message>"
+
+       Examples:
+        | message                                                           |
+        | The following columns are required but were empty: 'displayname'. |
+        | The following columns had an invalid data type: 'external'.       |
+        | The following columns are required but were empty: 'mail'.        |
+        | The following columns had an invalid data type: 'pwdReset'.       |
+        | The following columns are required but were empty: 'surname'.     |
+        | The following columns are required but were empty: 'username'.    |
+        | The following columns are required but were empty: 'givenname'.   |
+
+   Scenario: after uploading a file a user inspects the users page
+     When the user opens the users page
+     Then the new user " " was not added
+
+   @clean_user_import
+   Scenario: after uploading a file a user inspects the user import summaries page
+     When the user opens the user import summaries page
+     Then a table with the import information "New: 0, Updated: 0, Skipped: 1" regarding the file "userimport_keineParameter.csv" is shown

integrationTests/cypress/fixtures/userimport_keineParameter.csv

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+displayname,external,mail,pwdreset,surname,username,givenname
+ ,  ,  ,  ,  ,  ,