SAK-31980 poi 3.15, Signup poi 3.14 (sakaiproject#4182)

* SAK-31980 poi 3.15, Signup poi 3.14

* SAK-31980 Upgrade signup for newer POI

The pattern for creating a Hyperlink has changed so that now you use the creation helper associated with the workbook to create the links. This means signup can stay in sync with POI in the rest of Sakai.

master/pom.xml

@@ -119,7 +119,7 @@
     <sakai.xerces.api.version>2.6.2</sakai.xerces.api.version>
     <sakai.log4j.version>1.2.17</sakai.log4j.version>
     <sakai.slf4j.version>1.7.21</sakai.slf4j.version>
-    <sakai.poi.version>3.14</sakai.poi.version>
+    <sakai.poi.version>3.15</sakai.poi.version>
     <sakai.mockito.version>2.7.22</sakai.mockito.version>
     <sakai.powermock.version>1.7.0RC4</sakai.powermock.version>
     <sakai.okiosid.version>2.0</sakai.okiosid.version>

signup/tool/src/java/org/sakaiproject/signup/tool/downloadEvents/EventWorksheet.java

@@ -19,9 +19,9 @@
 
 package org.sakaiproject.signup.tool.downloadEvents;
 
+import org.apache.poi.common.usermodel.HyperlinkType;
 import org.apache.poi.ss.util.CellRangeAddress;
 import org.apache.poi.ss.usermodel.*;
-import org.apache.poi.hssf.usermodel.HSSFHyperlink;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.sakaiproject.exception.IdUnusedException;
 import org.sakaiproject.signup.logic.SakaiFacade;
@@ -1063,8 +1063,8 @@ private String getSiteTitle(String siteId) {
 		return title;
 	}
 
-	private HSSFHyperlink setAttachmentURLLinks(SignupAttachment attach) {
-		HSSFHyperlink hsHyperlink = new HSSFHyperlink(HSSFHyperlink.LINK_URL);
+	private Hyperlink setAttachmentURLLinks(SignupAttachment attach) {
+		Hyperlink hsHyperlink = wb.getCreationHelper().createHyperlink(HyperlinkType.URL);
 		String link = this.sakaiFacade.getServerConfigurationService().getServerUrl()
 				+ attach.getLocation();
 		hsHyperlink.setAddress(link);