Remove in-memory kickstart representation from traceback file (#1519895)

We have been doing this filtering already, but some paths have likely
changed and the filter was no longer effective.

So add two new filter strings:
"_intf.storage.ksdata"
"_intf.data"

After adding these two I was no longer able to find the plaintext password
anywhere in the traceback after manually triggering a crash with:

kill -USR1 `cat /var/run/anaconda.pid`

Resolves: rhbz#1519895
(cherry picked from commit fa4d491f88)

anaconda/pyanaconda/exception.py

@@ -254,6 +254,8 @@ def initExceptionHandling(anaconda):
                                 "_intf.storage.bootloader.password",
                                 "_intf.storage.data",
                                 "_intf.storage.encryptionPassphrase",
+                                "_intf.storage.ksdata",
+                                "_intf.data",
                                 "_bootloader.encrypted_password",
                                 "_bootloader.password",
                                 "payload._groups"],