Merge pull request #848 from bugzmanov/master

major bugs
[DOC-XXX][feature] -  Use Apache Velocity for mail templating
Merge pull request #849 from rsvato/mail_velocity

[DOC-XXX][feature] -  Use Apache Velocity for mail templating
RJA-1879
Frontend settings are shown in editable settings section and allow user to edit them
[RJA-1518][feature]: jclouds 1.0 -> 1.5
Make internal-api independent of jclouds
make backend and local-users independent of commons
Merge pull request #850 from rsvato/master

[RJA-1879] [fix] - Frontend settings are shown in editable settings section and allow user to edit them
[DOC-XXX][feature] - Restore Java 7 compatibility
Merge pull request #852 from rsvato/master

[DOC-XXX][feature] - Restore Java 7 compatibility
[DOC-XXX][fix] -  Test fixed for java 7
Merge pull request #853 from rsvato/master

[DOC-XXX][fix] - Test fixed for java 7
Merge pull request #851 from ddurnev/jclouds-1.5

[RJA-1518][feature]: jclouds 1.0 -> 1.5
[RJA-1535][fix]: amazon ssh check - catch Authorization exception
[DOC-XXX][feature] -  AST tranformation for assignement of $context  variable.
[DOC-XXX][feature] -  $context support with ast transformation
[RJA-1585][fix]: ssh port checker action fix
Reduce default timeout to 20 sec(added separate plugin property)
Log "auth fail" exceptions to action log
Merge pull request #855 from rsvato/ast

[DOC-XXX][feature] -  AST tranformation for assignement of $context  variable.
[DOC-XXX][feature] -  tests fixed
[DOC-XXX][feature] -  tests fixed
[DOC-XXX][feature] -  tests fixed
Merge pull request #854 from ddurnev/master

[RJA-1535][fix]: amazon ssh port check - catch Authorization exception