Some unit tests for URL parsing code in Pegasus.
Merge branch '4.3'

Conflicts:
	src/edu/isi/pegasus/common/util/PegasusURL.java
Chagned the regex in PegasusURL so that we can pass urls with just the
hostnames specified. e.g http://isis.isi.edu
Note: no trailing /
Merge branch '4.3'

Conflicts:
	src/edu/isi/pegasus/common/util/PegasusURL.java