Implement max duration waveforms to reduce RAM

We want to reduce the RAM of online analysis by creating the template banks with a higher f_low (lower frequency cutoff) determined by a set time duration (max_duration). When gstlal_inspiral_svd_bank is calling svd_bank and creating the banks, svd_bank will estimate the time-constrained f_low from max_duration and compare it with the config f_low. The function will pick out the higher one and overwrite the template_duration in Single Inspiral Table.