Remove mail-1.4.jar to prevent issues with TLS 1.2

Issue Summary

In FIsheye 4.8.7 we use javax.mail-1.6.2.jar to support TLS1.2 for mail. Due to dependencies from other packages, mail-1.4.jar is still included and can cause issues with sending mail if not explicitly removed.

Steps to Reproduce

1. Configure SMTP in Fisheye with the option Use SSL/TLS=true
2. Send a test mail using a mail server that does not support TLS1.0,1.1 (such as Office365)

Expected Results

Mail gets sent successfully

Actual Results

Test mail fails

The below exception is thrown in the atlassian-fisheye.log file:

nested exception is:
    	javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
	at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1420) [mail-1.4.jar:1.4]
	at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1408) [mail-1.4.jar:1.4]
	at com.sun.mail.smtp.SMTPTransport.ehlo(SMTPTransport.java:847) [mail-1.4.jar:1.4]
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:384) [mail-1.4.jar:1.4]

In this case, the mail-1.4.jar was picked up, instead of the correct 1.6.2. Since mail-1.4 does not support TLS1.2, the exception No appropriate protocol (protocol is disabled or cipher suites are inappropriate) is thrown

Workaround

• Remove mail-1.4.jar from $FISHEYE_INSTALLATION/lib
• Restart Fisheye