Improve run times for large projects by reusing connections by default

[mikealfare]

resolves #1082

Problem

Run times for large projects are taking a long time, in part due to the fact that we don't reuse connections by default. This problem is made worse when using Key Pair authorization as the RSA key needs to be validated every time a connection is created.

Solution

Update reuse_connections to a default of True if the user has not specified client_session_keep_alive=True.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX

[VersusFacit]

Judging from earlier conversations, does this PR need a rework? I think I saw the spec may have changed to default to True regardless here.

Slightly out of context, this is from you:

we will update the default on reuse_connections to be True

Just want to know target

[mikealfare]

Judging from earlier conversations, does this PR need a rework? I think I saw the spec may have changed to default to True regardless here.

Slightly out of context, this is from you:

we will update the default on reuse_connections to be True

Just want to know target

Fair, I should have updated the PR body. After internal discussions, we determined that we only wanted to default reuse_connections to True if the user didn't specify client_session_keep_alive=True (and didn't set reuse_connection). We wanted to do that to make the potentially risky scenario (reuse_connections=True and client_session_keep_alive=True) an opt-in scenario.

[VersusFacit]

Approved barring addressing that print issue left by @aranke since I was going to raise it too as well as double checking we don't need additional overriding on the profile generation tests (there are just so many of them!).