The header of invoked-methods.csv still seems incorrect

[gluckzhang]

Though commit a93e7f5 tries to fix the problem, it seems that the header is still incorrect. An example of the invoked-methods.csv in HedWig experiments:

visibility	parent-FQN	method-name	param-list	return-type	local-variables	conditionals	multiple-statements	loops	parameters	returns	switches	ifs	static	returns-primitives	classification
not-covered	False	False	False	False	getDnsServers	False	False	com.hs.mail.dns.DnsServer	java.lang.String[]	True	False	False	False	public
not-covered	False	True	True	True	readLine	True	False	com.hs.mail.io.LineReader	java.lang.String	True	False	False	True	public
not-covered	False	True	True	False	getHost	True	False	com.hs.mail.smtp.message.MailAddress	java.lang.String	True	False	False	False	public
not-covered	False	True	False	False	compareTo	False	java.lang.Object	True	com.hs.mail.smtp.message.MailAddress	int	True	True	False	False	public
not-covered	True	True	True	False	rewriteAddress	True	java.lang.String	True	com.hs.mail.imap.user.DefaultUserManager	java.lang.String	True	False	False	False	public
not-covered	False	False	True	False	mapRow	True	"java.sql.ResultSet	int"	True	com.hs.mail.imap.dao.AnsiUserDao$1	com.hs.mail.imap.user.User	True	False	False	False	public
not-covered	False	False	True	False	getUserByAddress	True	java.lang.String	True	com.hs.mail.imap.dao.AnsiUserDao	com.hs.mail.imap.user.User	True	False	False	False	public
not-covered	False	False	True	False	getUserByAddress	True	java.lang.String	True	com.hs.mail.imap.user.DefaultUserManager	com.hs.mail.imap.user.User	True	False	False	False	public
not-covered	True	True	True	False	getUser	True	False	com.hs.mail.smtp.message.MailAddress	java.lang.String	True	False	False	False	public
not-covered	True	False	True	False	getUserHome	True	com.hs.mail.smtp.message.MailAddress	True	com.hs.mail.imap.user.DefaultUserManager	java.io.File	True	False	False	False	public
not-covered	False	True	True	False	login	True	"java.lang.String	java.lang.String"	True	com.hs.mail.imap.user.DefaultUserManager	long	True	True	False	False	public

[gluckzhang]

By the way, this bug also leads pankti-generate to generate zero test cases for the target project.

[Deee92]

Thanks, @gluckzhang, looking into this!

[gluckzhang]

Figure out this is because the version of pandas. In the future, we may need to have a requirements.txt that lists all of the Python packages we are using. Users can use pip install -r requirements.txt to install the same version of the packages.