Remove unused parameters in integration tests

* remove HADOOP_DIRECTORY parameter
* remove HADOOP_VERSION and PLUGIN_NAME parameters from
map-reduce test script

Change-Id: I8eb4a1ebb5dc1462026f99347ae4bd5f5ddc9a11
Adding disconnected mode fixes to hdp plugin

Changes
* Adding function to determine if package epel-release is installed
* Adding logic to determine if hadoop-swift integration package is
installed
* Changing behavior of provision_ambari to check for installed rpm if it
fails to download files from the internet
* Changing behavior of install_swift_integration to check for installed
rpm if it fails to download rpm from the internet
* Adding variable for epel-release name
* Adding variable hadoop-swift local rpm
* Removing -v -h from rpm command
* Adding --quiet to rpm command
* Adding a variable for yum command to install swift integration rpm
* Adding log messages for local fallbacks

Closes-Bug: #1320991
Closes-Bug: #1285133
Change-Id: I7fbbdf131fcee698684c39c7241bb919cd904e26
Changing job excecution status to 'FAILED' in case of exception

Change-Id: Iabf3cffbfda7fe9fd2215fbdaf9a596b08d5bbde
Closes-Bug: #1306720
Closes-Bug: #1317205
Update documentation for Spark 1.0.0

Update Sahara documentation to make clear images with Spark 1.0.0
created by the DIB are now supported by the plugin.

Change-Id: Id9ec3b5947ee9212bb2ee77ebc0d4875e08486d8
Merge "Changing job excecution status to 'FAILED' in case of exception"
Merge "Remove unused parameters in integration tests"
Merge "Update documentation for Spark 1.0.0"
Merge "Adding disconnected mode fixes to hdp plugin"
Merge remote-tracking branch 'openstack/master' into spark-plugin