CNJR-1461: Increase OIDC ttl

[mFelgate]

Desired Outcome

For OIDC the token should have a 60 min lifespan, currently it is set to 8min. This pr changes the default ttl to PT60M and updates the test to confirm this as the default time.

Implemented Changes

Describe how the desired outcome above has been achieved with this PR. In
particular, consider:

• What's changed? Why were these changes made?
  set the default ttl varibale to be set to pt60m

Connected Issue/Story

Resolves #[relevant GitHub issue(s), e.g. 76]

CyberArk internal issue ID: CNJR-1461

Definition of Done

At least 1 todo must be completed in the sections below for the PR to be
merged.

Changelog

• The CHANGELOG has been updated, or
• This PR does not include user-facing changes and doesn't require a
  CHANGELOG update

Test coverage

• This PR includes new unit and integration tests to go with the code
  changes, or
• The changes in this PR do not require tests

Documentation

• Docs (e.g. READMEs) were updated in this PR
• A follow-up issue to update official docs has been filed here: [insert issue ID]
• This PR does not require updating any documentation

Behavior

• This PR changes product behavior and has been reviewed by a PO, or
• These changes are part of a larger initiative that will be reviewed later, or
• No behavior was changed with this PR

Security

• Security architect has reviewed the changes in this PR,
• These changes are part of a larger initiative with a separate security review, or
• There are no security aspects to these changes

[codeclimate]

Lists should be surrounded by blank lines

[codeclimate]

Code Climate has analyzed commit 97b2217 and detected 2 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Style	1
Complexity	1

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 89.9% (-1.3% change).

View more on Code Climate.

[codihuston]

LGTM!