CLOUDSTACK-4887: Fix CLVM template download from storage refactoring work
CLOUDSTACK-4637: Fix failures in test_egress_fw_rules.py

Removed log_test_exceptions which did not add any value.
Skipped few tests which are incomplete. Added timeout logic
and to wait for router to boot.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cloudstack
Fixed bug with snapshotting failing as 'not implemented'

Signed-off-by: Edison Su <sudison@gmail.com>