XOP-229: Make xenopsd using keep_alive.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
XOP-229: Make rrd_updates uses keep_alive=true.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
CA-98535: Fix VDI.create

The other_config, shareable, tags and xenstore_data fields are now set
to their correct values when creating a VDI.

Signed-off-by: John Else <john.else@citrix.com>
Whitespace: xapi_sr.ml

$ camlp4o -printer o -no_comments ocaml/xapi/xapi_srl | md5sum
7760aa8c3f302bc5ebca565b2c83b483  -
$ git checkout HEAD^
$ camlp4o -printer o -no_comments ocaml/xapi/xapi_sr.ml | md5sum
7760aa8c3f302bc5ebca565b2c83b483  -

Signed-off-by: John Else <john.else@citrix.com>
CA-98633: Raise SR_UUID_EXISTS in SR.introduce if an SR with the same UUID already exists.

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #1004 from johnelse/ca-98633

CA-98633: Raise SR_UUID_EXISTS in SR.introduce if an SR with the same UUID already exists.
Merge pull request #999 from johnelse/vdi-create-fix

CA-98535: Fix VDI.create
Merge pull request #996 from jeromemaloberti/XOP-229

XOP-229: Stunnel_cache fixes.