test(series/sales/import): open a page on every test to workaround htmlunit bug.

sendKeys() was failing with "StringIndexOutOfBoundsException: start > length()" exception when we
fill a field a second time. Opening a page on every test fixes that as there is no state left from a
previous test.

Workaround for HtmlUnit/htmlunit#142

Part of #1072

Author: php-coder

src/test/robotframework/series/sales/import/logic.robot

@@ -5,6 +5,7 @@ Resource        ../../../auth.steps.robot
 Resource        ../../../selenium.utils.robot
 Suite Setup     Before Test Suite
 Suite Teardown  Close Browser
+Test Setup      Before Test
 Force Tags      series  sales  import-sales  logic  react-related
 
 *** Test Cases ***
@@ -29,4 +30,6 @@ Before Test Suite
 	Open Browser                        ${SITE_URL}/account/auth  ${BROWSER}
 	Register Keyword To Run On Failure  Log Source
 	Log In As                           login=admin  password=test
+
+Before Test
 	Go To  ${SITE_URL}/series/1

src/test/robotframework/series/sales/import/validation.robot

@@ -5,6 +5,7 @@ Resource        ../../../auth.steps.robot
 Resource        ../../../selenium.utils.robot
 Suite Setup     Before Test Suite
 Suite Teardown  Close Browser
+Test Setup      Before Test
 Force Tags      series  sales  import-sales  validation  react-related
 
 *** Test Cases ***
@@ -32,6 +33,8 @@ Before Test Suite
 	Open Browser                        ${SITE_URL}/account/auth  ${BROWSER}
 	Register Keyword To Run On Failure  Log Source
 	Log In As                           login=admin  password=test
+
+Before Test
 	Go To  ${SITE_URL}/series/1
 
 Disable Client Validation