tests/provider: Fix unparam Linting Issues and Enable in TravisCI Testing

[bflad]

Closes #6336
Reference #5983

Changes proposed in this pull request:

• Fixing straightforward unparam linting issues such as unused parameters
• Exporting functions flagged by unparam that will eventually be migrated into their own packages (ones that should keep their same function signature)
• Removing getStringPtrList() which is part of Refactor Out getStringPtr() and getStringPtrList() #5983 👍

Output from acceptance testing:

--- PASS: TestAccAWSAutoScalingGroup_VpcUpdates (45.41s)
--- PASS: TestAccAWSAutoScalingGroup_namePrefix (47.51s)
--- PASS: TestAccAWSElasticTranscoderPipeline_basic (7.63s)
--- PASS: TestAccAWSAutoScalingGroup_emptyAvailabilityZones (63.25s)
--- PASS: TestAccAWSElasticTranscoderPipeline_notifications (12.13s)
--- PASS: TestAccAWSAutoScalingGroup_autoGeneratedName (77.29s)
--- PASS: TestAccAWSAutoScalingGroup_classicVpcZoneIdentifier (80.07s)
--- PASS: TestAccAWSElasticTranscoderPipeline_kmsKey (25.72s)
--- PASS: TestAccAWSAutoScalingGroup_launchTemplate (81.66s)
--- PASS: TestAccAWSElasticTranscoderPipeline_withPermissions (6.60s)
--- PASS: TestAccAWSElasticTranscoderPipeline_withContentConfig (12.30s)
--- PASS: TestAccAWSAutoScalingGroup_withMetrics (87.92s)
--- PASS: TestAccAWSAutoScalingGroup_ALB_TargetGroups (87.87s)
--- PASS: TestAccAWSAutoScalingGroup_LaunchTemplate_IAMInstanceProfile (58.59s)
--- PASS: TestAccAWSAutoScalingGroup_terminationPolicies (105.01s)
--- PASS: TestAccAWSAutoScalingGroup_withPlacementGroup (138.59s)
--- PASS: TestAccAWSAutoScalingGroup_enablingMetrics (167.31s)
--- PASS: TestAccAWSAutoScalingGroup_importBasic (168.45s)
--- PASS: TestAccAWSAutoScalingGroup_launchTemplate_update (198.27s)
--- PASS: TestAccAWSAutoScalingGroup_serviceLinkedRoleARN (198.89s)
--- PASS: TestAccAWSAutoScalingGroup_initialLifecycleHook (233.74s)
--- PASS: TestAccAWSAutoScalingGroup_basic (262.05s)
--- PASS: TestAccAWSAutoScalingGroup_tags (265.68s)
--- PASS: TestAccAWSAutoScalingGroup_suspendingProcesses (287.56s)
--- PASS: TestAccAWSAutoScalingGroup_ALB_TargetGroups_ELBCapacity (290.00s)
--- PASS: TestAccAWSEMRCluster_additionalInfo (342.91s)
--- PASS: TestAccAWSEMRCluster_basic (372.71s)
--- PASS: TestAccAWSEMRCluster_security_config (385.79s)
--- PASS: TestAccAWSEMRCluster_configurationsJson (414.18s)
--- PASS: TestAccAWSEMRCluster_instance_group_EBSVolumeType_st1 (419.35s)
--- PASS: TestAccAWSEMRCluster_Step_Basic (428.42s)
--- PASS: TestAccAWSEMRCluster_instance_group (453.19s)
--- PASS: TestAccAWSAutoScalingGroup_WithLoadBalancer (541.96s)
--- PASS: TestAccAWSEMRCluster_bootstrap_ordering (421.97s)
--- PASS: TestAccAWSEMRCluster_keepJob (393.11s)
--- PASS: TestAccAWSEMRCluster_Kerberos_ClusterDedicatedKdc (487.94s)
--- PASS: TestAccAWSEMRCluster_terminationProtected (467.78s)
--- PASS: TestAccAWSEMRCluster_Step_Multiple (530.79s)
--- PASS: TestAccAWSEMRCluster_s3Logging (597.50s)
--- PASS: TestAccAWSEMRCluster_tags (612.83s)
--- PASS: TestAccAWSEMRCluster_custom_ami_id (586.37s)
--- PASS: TestAccAWSEMRCluster_visibleToAllUsers (746.05s)
--- PASS: TestAccAWSEMRCluster_root_volume_size (705.99s)

[tombuildsstuff]

LGTM 👍

[ghost]

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