add prow bash files

[sipian]

Signed-off-by: sipian cs15btech11019@iith.ac.in

[prom-ci-robot]

@sipian: Looks like start-benchmark job is already running on this PR. Will start cancel-benchmark job once ongoing job is completed

In response to [this](https://github.com/sipian/prometheus/pull/9#issuecomment-406891507): >/benchmark cancel

[prom-ci-robot]

@sipian: Deletion of prombench failed: Failed to get ProwJob 83e40532-8de7-11e8-9e18-0a580a080087 to end start-benchmark.

In response to [this](https://github.com/sipian/prometheus/pull/9#issuecomment-406891507): >/benchmark cancel

[sipian]

/benchmark cancel

[prom-ci-robot]

@sipian: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
start-benchmark	b890fcd33dcbcf01c8c75705c156040c84100fb8	link	``
cancel-benchmark	b890fcd33dcbcf01c8c75705c156040c84100fb8	link	``

Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository. I understand the commands that are listed [here](https://go.k8s.io/bot-commands).

[sipian]

/benchmark release

[prom-ci-robot]

@sipian: Welcome to Prometheus Benchmarking Tool.

The two prometheus versions that will be compared are master and release-latest

The logs can be viewed at the links provided in the GitHub check blocks at the end of this conversation

After successfull deployment, the benchmarking metrics can be viewed at :

• promethues-meta - label {"namespace" : "prombench-9"}
• grafana - template-variable "pr-number" : 9

To cancel the benchmark process comment /benchmark cancel .

In response to [this](https://github.com/sipian/prometheus/pull/9#issuecomment-406893388): >/benchmark release