search something relevant into a Service/subservice in Splunk

[AlvaroVega]

issue: #196

Search in Splunk using log patterns:

- srv=SERVICE_NAME
- subsrv=SUBSERVICE_NAME                     
- lvl=LOG_LEVEL
- comp=COMPONENT
- trans=CORRELATOR_ID
- corr=TRANSACTION_ID
- CUSTOM_TEXT

• API
• Docker support
• Doc
• Search by correlatorID
• Search by transactionID
• Check and limit results
• Check invalid URls

Examples of usage:

curl -i -X GET http://localhost:8084/v1.0/service/80cc09886608474dbca6d07575d1a1db/relevant/Orion -H 'x-auth-token: 142afdf06f52422cb10fad6443a5a0d8'

curl -i -X GET http://localhost:8084/v1.0/service/80cc09886608474dbca6d07575d1a1db/relevant/cygnus-ngsi -H 'x-auth-token: 74c7ad35c3fe47ce903be5aeb1a994f5' -d '{ "LOG_LEVEL": "ERROR" }' -H 'content-type: application/json'

curl -i -X GET http://localhost:8084/v1.0/service/80cc09886608474dbca6d07575d1a1db/relevant/cygnus-ngsi -H 'x-auth-token: 74c7ad35c3fe47ce903be5aeb1a994f5' -d '{ "CORRELATOR_ID":"13123452asdfasd2342qwfawe424" }' -H 'content-type: application/json'

curl -i -X GET http://localhost:8084/v1.0/service/80cc09886608474dbca6d07575d1a1db/subservice/829ba886608474dbca6d07575dabc23456/relevant/cygnus-ngsi -H 'x-auth-token: 74c7ad35c3fe47ce903be5aeb1a994f5' -d '{ "CUSTOM_TEXT":"core dumped", "LOG_LEVEL": "ERROR" }' -H 'content-type: application/json'

[AlvaroVega]

To be merged with squash