pgAdmin4: Random failure of FTS test cases due to improper randomstring creation

Hi Dave,

        Please find the attached patch for UUID creation issues with test objects for FTS configurations, FTS dictionaries and FTS parsers. Previously(refer email with subject "Build failed in Jenkins: pgadmin4-master-python27 #279" and "Build failed in Jenkins: pgadmin4-master-python33 #207"), test cases were randomly failing due to repetitions of the test object names.

In the old code we used some part of the string for creating a UUID string, but it seems that at some point that created string gets repeated and due to which test cases were failing as this was a random behavior, now it is fixed.  

Thanks.

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Regards,

Navnath Gadakh

EnterpriseDB Corporation

The Enterprise PostgreSQL Company