Feature/file events

[dtitov]

Describe the pull request:

• Bug fix
• Functional change
• New feature
• Code cleanup
• Build system change
• Documentation change
• Language translation

Pull request long description:

Now we track events and send messages about them:

• File uploaded.
• File moved/renamed.
• File removed.

JSON body (as per @silverdaz):

{
                  'user': <str>,
              'filepath': <str>,
             'operation': ('upload' | 'remove' | 'rename' ),
              'filesize': <num>,
               'oldpath': <str>, // Ignored if not "rename"
    'file_last_modified': <num>, // a UNIX timestamp
   'encrypted_checksums': [{ 'type': <str>, 'value': <checksum as HEX> },
                           { 'type': <str>, 'value': <checksum as HEX> },
                            ...
                          ]
 }
The checksum algorithm type is 'md5', or 'sha256'.
'sha256' is prefered.

Related issues:

Fixes #16

[coveralls]

Pull Request Test Coverage Report for Build 128

• 33 of 35 (94.29%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+1.2%) to 73.541%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/main/java/se/nbis/lega/inbox/sftp/InboxSftpEventListener.java	33	35	94.29%

Totals
Change from base Build 112:	1.2%
Covered Lines:	189
Relevant Lines:	257

---

💛 - Coveralls

[amgadhanafy]

check for possible static import, to make the lines shorter and more readable

Fixed