Added the argon2 parameters to example.runtime.properties [secure password hashing] (#70)

* added argon2i parameters to example.runtime.properties
* fixed the style of the example.runtime.properties

Resolves: https://jira.duraspace.org/browse/VIVO-1448

home/src/main/resources/config/example.runtime.properties

@@ -34,6 +34,23 @@ Vitro.defaultNamespace = http://vivo.mydomain.edu/individual/
   #
 rootUser.emailAddress = vivo_root@mydomain.edu
 
+
+#
+# Argon2 password hashing parameters for time, memory and parallelism required to
+# compute a hash.
+#
+# A time cost defines the amount of computation realized and therefore the execution
+# time, given in a number of iterations.
+# A memory cost defines the memory usage, given in kibibytes
+# A parallelism degree defines the number of parallel threads
+# For determining the optimal values of the parameters for your setup please refer to
+# the white paper section  9
+# https://github.com/P-H-C/phc-winner-argon2/blob/master/argon2-specs.pdf
+#
+argon2.parallelism =1
+argon2.memory = 1024
+argon2.time = 1000
+
   #
   # The basic parameters for a database connection. Change the end of the 
   # URL to reflect your database name (if it is not "vitrodb"). Change the username