CLOUDSTACK-7528: More verbose logging when sending alert fails

When sendAlert is called on an AlertManager impl, if it fails it logs that
something was wrong but does not log the body of the issue/error. This means
we tell the user/admin that there was an issue but don't share the "issue"
with them at all as the email alert fail (or that they were not initialized).

(cherry picked from commit 91fd8d7cd5d5a83bf75f5f2972ad2eb2a4a07694)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Conflicts:
	server/src/com/cloud/alert/AlertManagerImpl.java
appliance: fix newer debian iso links and checksums for debian

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
(cherry picked from commit ac5309b8b47ddb1e5588a2d5090f2bcce0e7c2a4)

Conflicts:
	tools/appliance/definitions/systemvm64template/definition.rb
	tools/appliance/definitions/systemvmtemplate/definition.rb
CLOUDSTACK-6099 live migration is failing for vm deployed using dynaic compute offerings with NPE

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
Merge remote-tracking branch 'origin/hotfix/4.4/CLOUDSTACK-6099' into 4.4
Add "Edit Tags" functionality to SecurityGroup rules in UI

Signed-off-by: Ilia Shakitko <i.shakitko@tech.leaseweb.com>
(cherry picked from commit 281c866206036235790773fbcb86edede0ac739d)
CLOUDSTACK-7462: UI > Network > VPC > Router > Network ACL Lists > click an entry from list > Details tab > ACL List Rules tab > click Edit icon on any existing rule > fix the JavaScript error "args.jsonObj is undefined".
CLOUDSTACK-6223. removeNicFromVirtualMachine fails if another instance in another domain has a nic with the same ip and a forwarding rule configured on it

Signed-off-by: Daan Hoogland <daan@onecht.net>
(cherry picked from commit e9af5f44ae080da3f191cba57b55747801c3100e)
CLOUDSTACK-6738: pre-seed expunge delay and interval to 60s
Remove the misc tests from travis as they do not exist in 4.4
Cleaning the README, INSTALL and CHANGES file
CLOUDSTACK-7184: xenheartbeat gets passed timeout and interval
CLOUDSTACK-7527 reboot faster by writing to /proc/sysrq-trigger
CLOUDSTACK-7184 retry-wait loop config to deal with network glitches